Compute aspect ratio

index.js

const isApproximateInteger = value => {
    const min = Math.floor(value);
    const max = Math.ceil(value);

    return value - min <= 0.01 || max - value <= 0.01;
};

const MAX_TRY = 120;

const computeToRatio = (width, height) => {
    const base = width / height;
    for (let i = 1; i <= MAX_TRY; i++) {
        const value = base * i;
        if (isApproximateInteger(value)) {
            console.log(`${Math.round(value)} : ${i}`);
            return;
        }
    }
    console.log(`${width} : ${height}`);
};

computeToRatio(1920, 1080); // 16 : 9
computeToRatio(982, 737); // 4 : 3