diff --git a/CHANGELOG.md b/CHANGELOG.md
index d1e64af..9cd3f5e 100644
--- a/CHANGELOG.md
+++ b/CHANGELOG.md
@@ -1,3 +1,6 @@
+# v1.3.0
+- Improving calculation of ratio for nonStandard case #1
+
 # v1.2.0
 - Add CommonJS support.
 - Add example.
diff --git a/package-lock.json b/package-lock.json
index 9ed8d56..ecb7160 100644
--- a/package-lock.json
+++ b/package-lock.json
@@ -1,19 +1,19 @@
 {
   "name": "calc-aspect-ratio",
-  "version": "1.2.0",
+  "version": "1.3.0",
   "lockfileVersion": 3,
   "requires": true,
   "packages": {
     "": {
       "name": "calc-aspect-ratio",
-      "version": "1.2.0",
+      "version": "1.3.0",
       "license": "MIT",
       "devDependencies": {
         "@rollup/plugin-typescript": "^11.1.6",
         "@types/jest": "^29.5.12",
         "del-cli": "^5.1.0",
         "jest": "^29.7.0",
-        "rollup": "^4.10.0",
+        "rollup": "^4.12.0",
         "ts-jest": "^29.1.2",
         "tslib": "2.6.2",
         "typescript": "^5.3.3"
@@ -1020,9 +1020,9 @@
       }
     },
     "node_modules/@jridgewell/resolve-uri": {
-      "version": "3.1.1",
-      "resolved": "https://registry.npmjs.org/@jridgewell/resolve-uri/-/resolve-uri-3.1.1.tgz",
-      "integrity": "sha512-dSYZh7HhCDtCKm4QakX0xFpsRDqjjtZf/kjI/v3T3Nwt5r8/qz/M19F9ySyOqU94SXBmeG9ttTul+YnR4LOxFA==",
+      "version": "3.1.2",
+      "resolved": "https://registry.npmjs.org/@jridgewell/resolve-uri/-/resolve-uri-3.1.2.tgz",
+      "integrity": "sha512-bRISgCIjP20/tbWSPWMEi54QVPRZExkuD9lJL+UIxUKtwVJA8wW1Trb1jMs1RFXo1CBTNZ/5hpC9QvmKWdopKw==",
       "dev": true,
       "engines": {
         "node": ">=6.0.0"
@@ -1137,9 +1137,9 @@
       }
     },
     "node_modules/@rollup/rollup-android-arm-eabi": {
-      "version": "4.10.0",
-      "resolved": "https://registry.npmjs.org/@rollup/rollup-android-arm-eabi/-/rollup-android-arm-eabi-4.10.0.tgz",
-      "integrity": "sha512-/MeDQmcD96nVoRumKUljsYOLqfv1YFJps+0pTrb2Z9Nl/w5qNUysMaWQsrd1mvAlNT4yza1iVyIu4Q4AgF6V3A==",
+      "version": "4.12.0",
+      "resolved": "https://registry.npmjs.org/@rollup/rollup-android-arm-eabi/-/rollup-android-arm-eabi-4.12.0.tgz",
+      "integrity": "sha512-+ac02NL/2TCKRrJu2wffk1kZ+RyqxVUlbjSagNgPm94frxtr+XDL12E5Ll1enWskLrtrZ2r8L3wED1orIibV/w==",
       "cpu": [
         "arm"
       ],
@@ -1150,9 +1150,9 @@
       ]
     },
     "node_modules/@rollup/rollup-android-arm64": {
-      "version": "4.10.0",
-      "resolved": "https://registry.npmjs.org/@rollup/rollup-android-arm64/-/rollup-android-arm64-4.10.0.tgz",
-      "integrity": "sha512-lvu0jK97mZDJdpZKDnZI93I0Om8lSDaiPx3OiCk0RXn3E8CMPJNS/wxjAvSJJzhhZpfjXsjLWL8LnS6qET4VNQ==",
+      "version": "4.12.0",
+      "resolved": "https://registry.npmjs.org/@rollup/rollup-android-arm64/-/rollup-android-arm64-4.12.0.tgz",
+      "integrity": "sha512-OBqcX2BMe6nvjQ0Nyp7cC90cnumt8PXmO7Dp3gfAju/6YwG0Tj74z1vKrfRz7qAv23nBcYM8BCbhrsWqO7PzQQ==",
       "cpu": [
         "arm64"
       ],
@@ -1163,9 +1163,9 @@
       ]
     },
     "node_modules/@rollup/rollup-darwin-arm64": {
-      "version": "4.10.0",
-      "resolved": "https://registry.npmjs.org/@rollup/rollup-darwin-arm64/-/rollup-darwin-arm64-4.10.0.tgz",
-      "integrity": "sha512-uFpayx8I8tyOvDkD7X6n0PriDRWxcqEjqgtlxnUA/G9oS93ur9aZ8c8BEpzFmsed1TH5WZNG5IONB8IiW90TQg==",
+      "version": "4.12.0",
+      "resolved": "https://registry.npmjs.org/@rollup/rollup-darwin-arm64/-/rollup-darwin-arm64-4.12.0.tgz",
+      "integrity": "sha512-X64tZd8dRE/QTrBIEs63kaOBG0b5GVEd3ccoLtyf6IdXtHdh8h+I56C2yC3PtC9Ucnv0CpNFJLqKFVgCYe0lOQ==",
       "cpu": [
         "arm64"
       ],
@@ -1176,9 +1176,9 @@
       ]
     },
     "node_modules/@rollup/rollup-darwin-x64": {
-      "version": "4.10.0",
-      "resolved": "https://registry.npmjs.org/@rollup/rollup-darwin-x64/-/rollup-darwin-x64-4.10.0.tgz",
-      "integrity": "sha512-nIdCX03qFKoR/MwQegQBK+qZoSpO3LESurVAC6s6jazLA1Mpmgzo3Nj3H1vydXp/JM29bkCiuF7tDuToj4+U9Q==",
+      "version": "4.12.0",
+      "resolved": "https://registry.npmjs.org/@rollup/rollup-darwin-x64/-/rollup-darwin-x64-4.12.0.tgz",
+      "integrity": "sha512-cc71KUZoVbUJmGP2cOuiZ9HSOP14AzBAThn3OU+9LcA1+IUqswJyR1cAJj3Mg55HbjZP6OLAIscbQsQLrpgTOg==",
       "cpu": [
         "x64"
       ],
@@ -1189,9 +1189,9 @@
       ]
     },
     "node_modules/@rollup/rollup-linux-arm-gnueabihf": {
-      "version": "4.10.0",
-      "resolved": "https://registry.npmjs.org/@rollup/rollup-linux-arm-gnueabihf/-/rollup-linux-arm-gnueabihf-4.10.0.tgz",
-      "integrity": "sha512-Fz7a+y5sYhYZMQFRkOyCs4PLhICAnxRX/GnWYReaAoruUzuRtcf+Qnw+T0CoAWbHCuz2gBUwmWnUgQ67fb3FYw==",
+      "version": "4.12.0",
+      "resolved": "https://registry.npmjs.org/@rollup/rollup-linux-arm-gnueabihf/-/rollup-linux-arm-gnueabihf-4.12.0.tgz",
+      "integrity": "sha512-a6w/Y3hyyO6GlpKL2xJ4IOh/7d+APaqLYdMf86xnczU3nurFTaVN9s9jOXQg97BE4nYm/7Ga51rjec5nfRdrvA==",
       "cpu": [
         "arm"
       ],
@@ -1202,9 +1202,9 @@
       ]
     },
     "node_modules/@rollup/rollup-linux-arm64-gnu": {
-      "version": "4.10.0",
-      "resolved": "https://registry.npmjs.org/@rollup/rollup-linux-arm64-gnu/-/rollup-linux-arm64-gnu-4.10.0.tgz",
-      "integrity": "sha512-yPtF9jIix88orwfTi0lJiqINnlWo6p93MtZEoaehZnmCzEmLL0eqjA3eGVeyQhMtxdV+Mlsgfwhh0+M/k1/V7Q==",
+      "version": "4.12.0",
+      "resolved": "https://registry.npmjs.org/@rollup/rollup-linux-arm64-gnu/-/rollup-linux-arm64-gnu-4.12.0.tgz",
+      "integrity": "sha512-0fZBq27b+D7Ar5CQMofVN8sggOVhEtzFUwOwPppQt0k+VR+7UHMZZY4y+64WJ06XOhBTKXtQB/Sv0NwQMXyNAA==",
       "cpu": [
         "arm64"
       ],
@@ -1215,9 +1215,9 @@
       ]
     },
     "node_modules/@rollup/rollup-linux-arm64-musl": {
-      "version": "4.10.0",
-      "resolved": "https://registry.npmjs.org/@rollup/rollup-linux-arm64-musl/-/rollup-linux-arm64-musl-4.10.0.tgz",
-      "integrity": "sha512-9GW9yA30ib+vfFiwjX+N7PnjTnCMiUffhWj4vkG4ukYv1kJ4T9gHNg8zw+ChsOccM27G9yXrEtMScf1LaCuoWQ==",
+      "version": "4.12.0",
+      "resolved": "https://registry.npmjs.org/@rollup/rollup-linux-arm64-musl/-/rollup-linux-arm64-musl-4.12.0.tgz",
+      "integrity": "sha512-eTvzUS3hhhlgeAv6bfigekzWZjaEX9xP9HhxB0Dvrdbkk5w/b+1Sxct2ZuDxNJKzsRStSq1EaEkVSEe7A7ipgQ==",
       "cpu": [
         "arm64"
       ],
@@ -1228,9 +1228,9 @@
       ]
     },
     "node_modules/@rollup/rollup-linux-riscv64-gnu": {
-      "version": "4.10.0",
-      "resolved": "https://registry.npmjs.org/@rollup/rollup-linux-riscv64-gnu/-/rollup-linux-riscv64-gnu-4.10.0.tgz",
-      "integrity": "sha512-X1ES+V4bMq2ws5fF4zHornxebNxMXye0ZZjUrzOrf7UMx1d6wMQtfcchZ8SqUnQPPHdOyOLW6fTcUiFgHFadRA==",
+      "version": "4.12.0",
+      "resolved": "https://registry.npmjs.org/@rollup/rollup-linux-riscv64-gnu/-/rollup-linux-riscv64-gnu-4.12.0.tgz",
+      "integrity": "sha512-ix+qAB9qmrCRiaO71VFfY8rkiAZJL8zQRXveS27HS+pKdjwUfEhqo2+YF2oI+H/22Xsiski+qqwIBxVewLK7sw==",
       "cpu": [
         "riscv64"
       ],
@@ -1241,9 +1241,9 @@
       ]
     },
     "node_modules/@rollup/rollup-linux-x64-gnu": {
-      "version": "4.10.0",
-      "resolved": "https://registry.npmjs.org/@rollup/rollup-linux-x64-gnu/-/rollup-linux-x64-gnu-4.10.0.tgz",
-      "integrity": "sha512-w/5OpT2EnI/Xvypw4FIhV34jmNqU5PZjZue2l2Y3ty1Ootm3SqhI+AmfhlUYGBTd9JnpneZCDnt3uNOiOBkMyw==",
+      "version": "4.12.0",
+      "resolved": "https://registry.npmjs.org/@rollup/rollup-linux-x64-gnu/-/rollup-linux-x64-gnu-4.12.0.tgz",
+      "integrity": "sha512-TenQhZVOtw/3qKOPa7d+QgkeM6xY0LtwzR8OplmyL5LrgTWIXpTQg2Q2ycBf8jm+SFW2Wt/DTn1gf7nFp3ssVA==",
       "cpu": [
         "x64"
       ],
@@ -1254,9 +1254,9 @@
       ]
     },
     "node_modules/@rollup/rollup-linux-x64-musl": {
-      "version": "4.10.0",
-      "resolved": "https://registry.npmjs.org/@rollup/rollup-linux-x64-musl/-/rollup-linux-x64-musl-4.10.0.tgz",
-      "integrity": "sha512-q/meftEe3QlwQiGYxD9rWwB21DoKQ9Q8wA40of/of6yGHhZuGfZO0c3WYkN9dNlopHlNT3mf5BPsUSxoPuVQaw==",
+      "version": "4.12.0",
+      "resolved": "https://registry.npmjs.org/@rollup/rollup-linux-x64-musl/-/rollup-linux-x64-musl-4.12.0.tgz",
+      "integrity": "sha512-LfFdRhNnW0zdMvdCb5FNuWlls2WbbSridJvxOvYWgSBOYZtgBfW9UGNJG//rwMqTX1xQE9BAodvMH9tAusKDUw==",
       "cpu": [
         "x64"
       ],
@@ -1267,9 +1267,9 @@
       ]
     },
     "node_modules/@rollup/rollup-win32-arm64-msvc": {
-      "version": "4.10.0",
-      "resolved": "https://registry.npmjs.org/@rollup/rollup-win32-arm64-msvc/-/rollup-win32-arm64-msvc-4.10.0.tgz",
-      "integrity": "sha512-NrR6667wlUfP0BHaEIKgYM/2va+Oj+RjZSASbBMnszM9k+1AmliRjHc3lJIiOehtSSjqYiO7R6KLNrWOX+YNSQ==",
+      "version": "4.12.0",
+      "resolved": "https://registry.npmjs.org/@rollup/rollup-win32-arm64-msvc/-/rollup-win32-arm64-msvc-4.12.0.tgz",
+      "integrity": "sha512-JPDxovheWNp6d7AHCgsUlkuCKvtu3RB55iNEkaQcf0ttsDU/JZF+iQnYcQJSk/7PtT4mjjVG8N1kpwnI9SLYaw==",
       "cpu": [
         "arm64"
       ],
@@ -1280,9 +1280,9 @@
       ]
     },
     "node_modules/@rollup/rollup-win32-ia32-msvc": {
-      "version": "4.10.0",
-      "resolved": "https://registry.npmjs.org/@rollup/rollup-win32-ia32-msvc/-/rollup-win32-ia32-msvc-4.10.0.tgz",
-      "integrity": "sha512-FV0Tpt84LPYDduIDcXvEC7HKtyXxdvhdAOvOeWMWbQNulxViH2O07QXkT/FffX4FqEI02jEbCJbr+YcuKdyyMg==",
+      "version": "4.12.0",
+      "resolved": "https://registry.npmjs.org/@rollup/rollup-win32-ia32-msvc/-/rollup-win32-ia32-msvc-4.12.0.tgz",
+      "integrity": "sha512-fjtuvMWRGJn1oZacG8IPnzIV6GF2/XG+h71FKn76OYFqySXInJtseAqdprVTDTyqPxQOG9Exak5/E9Z3+EJ8ZA==",
       "cpu": [
         "ia32"
       ],
@@ -1293,9 +1293,9 @@
       ]
     },
     "node_modules/@rollup/rollup-win32-x64-msvc": {
-      "version": "4.10.0",
-      "resolved": "https://registry.npmjs.org/@rollup/rollup-win32-x64-msvc/-/rollup-win32-x64-msvc-4.10.0.tgz",
-      "integrity": "sha512-OZoJd+o5TaTSQeFFQ6WjFCiltiYVjIdsXxwu/XZ8qRpsvMQr4UsVrE5UyT9RIvsnuF47DqkJKhhVZ2Q9YW9IpQ==",
+      "version": "4.12.0",
+      "resolved": "https://registry.npmjs.org/@rollup/rollup-win32-x64-msvc/-/rollup-win32-x64-msvc-4.12.0.tgz",
+      "integrity": "sha512-ZYmr5mS2wd4Dew/JjT0Fqi2NPB/ZhZ2VvPp7SmvPZb4Y1CG/LRcS6tcRo2cYU7zLK5A7cdbhWnnWmUjoI4qapg==",
       "cpu": [
         "x64"
       ],
@@ -1426,9 +1426,9 @@
       "dev": true
     },
     "node_modules/@types/node": {
-      "version": "20.11.16",
-      "resolved": "https://registry.npmjs.org/@types/node/-/node-20.11.16.tgz",
-      "integrity": "sha512-gKb0enTmRCzXSSUJDq6/sPcqrfCv2mkkG6Jt/clpn5eiCbKTY+SgZUxo+p8ZKMof5dCp9vHQUAB7wOUTod22wQ==",
+      "version": "20.11.19",
+      "resolved": "https://registry.npmjs.org/@types/node/-/node-20.11.19.tgz",
+      "integrity": "sha512-7xMnVEcZFu0DikYjWOlRq7NTPETrm7teqUT2WkQjrTIkEgUyyGdWsj/Zg8bEJt5TNklzbPD1X3fqfsHw3SpapQ==",
       "dev": true,
       "dependencies": {
         "undici-types": "~5.26.4"
@@ -1692,9 +1692,9 @@
       }
     },
     "node_modules/browserslist": {
-      "version": "4.22.3",
-      "resolved": "https://registry.npmjs.org/browserslist/-/browserslist-4.22.3.tgz",
-      "integrity": "sha512-UAp55yfwNv0klWNapjs/ktHoguxuQNGnOzxYmfnXIS+8AsRDZkSDxg7R1AX3GKzn078SBI5dzwzj/Yx0Or0e3A==",
+      "version": "4.23.0",
+      "resolved": "https://registry.npmjs.org/browserslist/-/browserslist-4.23.0.tgz",
+      "integrity": "sha512-QW8HiM1shhT2GuzkvklfjcKDiWFXHOeFCIA/huJPwHsslwcydgk7X+z2zXpEijP98UCY7HbubZt5J2Zgvf0CaQ==",
       "dev": true,
       "funding": [
         {
@@ -1711,8 +1711,8 @@
         }
       ],
       "dependencies": {
-        "caniuse-lite": "^1.0.30001580",
-        "electron-to-chromium": "^1.4.648",
+        "caniuse-lite": "^1.0.30001587",
+        "electron-to-chromium": "^1.4.668",
         "node-releases": "^2.0.14",
         "update-browserslist-db": "^1.0.13"
       },
@@ -1811,9 +1811,9 @@
       }
     },
     "node_modules/caniuse-lite": {
-      "version": "1.0.30001585",
-      "resolved": "https://registry.npmjs.org/caniuse-lite/-/caniuse-lite-1.0.30001585.tgz",
-      "integrity": "sha512-yr2BWR1yLXQ8fMpdS/4ZZXpseBgE7o4g41x3a6AJOqZuOi+iE/WdJYAuZ6Y95i4Ohd2Y+9MzIWRR+uGABH4s3Q==",
+      "version": "1.0.30001589",
+      "resolved": "https://registry.npmjs.org/caniuse-lite/-/caniuse-lite-1.0.30001589.tgz",
+      "integrity": "sha512-vNQWS6kI+q6sBlHbh71IIeC+sRwK2N3EDySc/updIGhIee2x5z00J4c1242/5/d6EpEMdOnk/m+6tuk4/tcsqg==",
       "dev": true,
       "funding": [
         {
@@ -2145,9 +2145,9 @@
       }
     },
     "node_modules/electron-to-chromium": {
-      "version": "1.4.661",
-      "resolved": "https://registry.npmjs.org/electron-to-chromium/-/electron-to-chromium-1.4.661.tgz",
-      "integrity": "sha512-AFg4wDHSOk5F+zA8aR+SVIOabu7m0e7BiJnigCvPXzIGy731XENw/lmNxTySpVFtkFEy+eyt4oHhh5FF3NjQNw==",
+      "version": "1.4.679",
+      "resolved": "https://registry.npmjs.org/electron-to-chromium/-/electron-to-chromium-1.4.679.tgz",
+      "integrity": "sha512-NhQMsz5k0d6m9z3qAxnsOR/ebal4NAGsrNVRwcDo4Kc/zQ7KdsTKZUxZoygHcVRb0QDW3waEDIcE3isZ79RP6g==",
       "dev": true
     },
     "node_modules/emittery": {
@@ -2483,9 +2483,9 @@
       }
     },
     "node_modules/hasown": {
-      "version": "2.0.0",
-      "resolved": "https://registry.npmjs.org/hasown/-/hasown-2.0.0.tgz",
-      "integrity": "sha512-vUptKVTpIJhcczKBbgnS+RtcuYMB8+oNzPK2/Hp3hanz8JmpATdmmgLgSaadVREkDm+e2giHwY3ZRkyjSIDDFA==",
+      "version": "2.0.1",
+      "resolved": "https://registry.npmjs.org/hasown/-/hasown-2.0.1.tgz",
+      "integrity": "sha512-1/th4MHjnwncwXsIW6QMzlvYL9kG5e/CpVvLRZe4XPa8TOUNbCELqmvhDmnkNsAjwaG4+I8gJJL0JBvTTLO9qA==",
       "dev": true,
       "dependencies": {
         "function-bind": "^1.1.2"
@@ -2731,14 +2731,14 @@
       }
     },
     "node_modules/istanbul-lib-instrument": {
-      "version": "6.0.1",
-      "resolved": "https://registry.npmjs.org/istanbul-lib-instrument/-/istanbul-lib-instrument-6.0.1.tgz",
-      "integrity": "sha512-EAMEJBsYuyyztxMxW3g7ugGPkrZsV57v0Hmv3mm1uQsmB+QnZuepg731CRaIgeUVSdmsTngOkSnauNF8p7FIhA==",
+      "version": "6.0.2",
+      "resolved": "https://registry.npmjs.org/istanbul-lib-instrument/-/istanbul-lib-instrument-6.0.2.tgz",
+      "integrity": "sha512-1WUsZ9R1lA0HtBSohTkm39WTPlNKSJ5iFk7UwqXkBLoHQT+hfqPsfsTDVuZdKGaBwn7din9bS7SsnoAr943hvw==",
       "dev": true,
       "dependencies": {
-        "@babel/core": "^7.12.3",
-        "@babel/parser": "^7.14.7",
-        "@istanbuljs/schema": "^0.1.2",
+        "@babel/core": "^7.23.9",
+        "@babel/parser": "^7.23.9",
+        "@istanbuljs/schema": "^0.1.3",
         "istanbul-lib-coverage": "^3.2.0",
         "semver": "^7.5.4"
       },
@@ -2808,9 +2808,9 @@
       }
     },
     "node_modules/istanbul-reports": {
-      "version": "3.1.6",
-      "resolved": "https://registry.npmjs.org/istanbul-reports/-/istanbul-reports-3.1.6.tgz",
-      "integrity": "sha512-TLgnMkKg3iTDsQ9PbPTdpfAK2DzjF9mqUG7RMgcQl8oFjad8ob4laGxv5XV5U9MAfx8D6tSJiUyuAwzLicaxlg==",
+      "version": "3.1.7",
+      "resolved": "https://registry.npmjs.org/istanbul-reports/-/istanbul-reports-3.1.7.tgz",
+      "integrity": "sha512-BewmUXImeuRk2YY0PVbxgKAysvhRPUQE0h5QRM++nVWyubKGV0l8qQ5op8+B2DOmwSe63Jivj0BjkPQVf8fP5g==",
       "dev": true,
       "dependencies": {
         "html-escaper": "^2.0.0",
@@ -4325,9 +4325,9 @@
       }
     },
     "node_modules/rollup": {
-      "version": "4.10.0",
-      "resolved": "https://registry.npmjs.org/rollup/-/rollup-4.10.0.tgz",
-      "integrity": "sha512-t2v9G2AKxcQ8yrG+WGxctBes1AomT0M4ND7jTFBCVPXQ/WFTvNSefIrNSmLKhIKBrvN8SG+CZslimJcT3W2u2g==",
+      "version": "4.12.0",
+      "resolved": "https://registry.npmjs.org/rollup/-/rollup-4.12.0.tgz",
+      "integrity": "sha512-wz66wn4t1OHIJw3+XU7mJJQV/2NAfw5OAk6G6Hoo3zcvz/XOfQ52Vgi+AN4Uxoxi0KBBwk2g8zPrTDA4btSB/Q==",
       "dev": true,
       "dependencies": {
         "@types/estree": "1.0.5"
@@ -4340,19 +4340,19 @@
         "npm": ">=8.0.0"
       },
       "optionalDependencies": {
-        "@rollup/rollup-android-arm-eabi": "4.10.0",
-        "@rollup/rollup-android-arm64": "4.10.0",
-        "@rollup/rollup-darwin-arm64": "4.10.0",
-        "@rollup/rollup-darwin-x64": "4.10.0",
-        "@rollup/rollup-linux-arm-gnueabihf": "4.10.0",
-        "@rollup/rollup-linux-arm64-gnu": "4.10.0",
-        "@rollup/rollup-linux-arm64-musl": "4.10.0",
-        "@rollup/rollup-linux-riscv64-gnu": "4.10.0",
-        "@rollup/rollup-linux-x64-gnu": "4.10.0",
-        "@rollup/rollup-linux-x64-musl": "4.10.0",
-        "@rollup/rollup-win32-arm64-msvc": "4.10.0",
-        "@rollup/rollup-win32-ia32-msvc": "4.10.0",
-        "@rollup/rollup-win32-x64-msvc": "4.10.0",
+        "@rollup/rollup-android-arm-eabi": "4.12.0",
+        "@rollup/rollup-android-arm64": "4.12.0",
+        "@rollup/rollup-darwin-arm64": "4.12.0",
+        "@rollup/rollup-darwin-x64": "4.12.0",
+        "@rollup/rollup-linux-arm-gnueabihf": "4.12.0",
+        "@rollup/rollup-linux-arm64-gnu": "4.12.0",
+        "@rollup/rollup-linux-arm64-musl": "4.12.0",
+        "@rollup/rollup-linux-riscv64-gnu": "4.12.0",
+        "@rollup/rollup-linux-x64-gnu": "4.12.0",
+        "@rollup/rollup-linux-x64-musl": "4.12.0",
+        "@rollup/rollup-win32-arm64-msvc": "4.12.0",
+        "@rollup/rollup-win32-ia32-msvc": "4.12.0",
+        "@rollup/rollup-win32-x64-msvc": "4.12.0",
         "fsevents": "~2.3.2"
       }
     },
@@ -4463,9 +4463,9 @@
       }
     },
     "node_modules/spdx-exceptions": {
-      "version": "2.4.0",
-      "resolved": "https://registry.npmjs.org/spdx-exceptions/-/spdx-exceptions-2.4.0.tgz",
-      "integrity": "sha512-hcjppoJ68fhxA/cjbN4T8N6uCUejN8yFw69ttpqtBeCbF3u13n7mb31NB9jKwGTTWWnt9IbRA/mf1FprYS8wfw==",
+      "version": "2.5.0",
+      "resolved": "https://registry.npmjs.org/spdx-exceptions/-/spdx-exceptions-2.5.0.tgz",
+      "integrity": "sha512-PiU42r+xO4UbUS1buo3LPJkjlO7430Xn5SVAhdpzzsPHsjbYVflnnFdATgabnLude+Cqu25p6N+g2lw/PFsa4w==",
       "dev": true
     },
     "node_modules/spdx-expression-parse": {
@@ -4479,9 +4479,9 @@
       }
     },
     "node_modules/spdx-license-ids": {
-      "version": "3.0.16",
-      "resolved": "https://registry.npmjs.org/spdx-license-ids/-/spdx-license-ids-3.0.16.tgz",
-      "integrity": "sha512-eWN+LnM3GR6gPu35WxNgbGl8rmY1AEmoMDvL/QD6zYmPWgywxWqJWNdLGT+ke8dKNWrcYgYjPpG5gbTfghP8rw==",
+      "version": "3.0.17",
+      "resolved": "https://registry.npmjs.org/spdx-license-ids/-/spdx-license-ids-3.0.17.tgz",
+      "integrity": "sha512-sh8PWc/ftMqAAdFiBu6Fy6JUOYjqDJBJvIhpfDMyHrr0Rbp5liZqd4TjtQ/RgfLjKFZb+LMx5hpml5qOWy0qvg==",
       "dev": true
     },
     "node_modules/sprintf-js": {
diff --git a/package.json b/package.json
index b10372f..9230c52 100644
--- a/package.json
+++ b/package.json
@@ -1,6 +1,6 @@
 {
   "name": "calc-aspect-ratio",
-  "version": "1.2.0",
+  "version": "1.3.0",
   "description": "Calc aspect ratio for display resolutions",
   "type": "module",
   "main": "dist/index.common.js",
@@ -43,7 +43,7 @@
     "@types/jest": "^29.5.12",
     "del-cli": "^5.1.0",
     "jest": "^29.7.0",
-    "rollup": "^4.10.0",
+    "rollup": "^4.12.0",
     "ts-jest": "^29.1.2",
     "tslib": "2.6.2",
     "typescript": "^5.3.3"
diff --git a/src/index.ts b/src/index.ts
index 7419c35..30a97e3 100644
--- a/src/index.ts
+++ b/src/index.ts
@@ -83,8 +83,14 @@ export function calcAspectRatio(
         };
     }
 
-    const x = Math.round(ratio * 100) / 100;
-    const y = 1;
+    const divisor = gcd(width, height);
+    let x = width / divisor;
+    let y = height / divisor;
+
+    if (x === width || y === height) {
+        x = Math.round(ratio * 100) / 100;
+        y = 1;
+    }
 
     return {
         x,
@@ -105,3 +111,11 @@ function findElement(elems: number[], value: number, tolerance: number) {
 
     return undefined;
 }
+
+function gcd(a = 0, b = 0) {
+    while (b) {
+        [a, b] = [b, a % b];
+    }
+
+    return a;
+}
diff --git a/test/index.test.ts b/test/index.test.ts
index b03e6eb..2b944b2 100644
--- a/test/index.test.ts
+++ b/test/index.test.ts
@@ -26,7 +26,8 @@ const resolutions: [string, string, number, number][] = [
     ['4K UHD', '16:9', 3840, 2160],
     ['high-end displays since 2017', '32:9', 5120, 1440],
     ['Advertisement displays', '4:1', 17280, 4320],
-    ['non standard', '142.99:1', 111100, 777],
+    ['non standard 1', '255:8', 10200, 320],
+    ['non standard 2', '33.37:1', 11111, 333],
 ];
 
 describe('Aspect ratio for display resolution', () => {