百分比计算JS

百分比 = (部分 / 全部) * 100%

// 简单百分比计算
function calculatePercentage(part, whole) {
    return (part / whole) * 100;
}

console.log(calculatePercentage(50, 200)); // 输出: 25

// 增长百分比计算
function calculateGrowthPercentage(previousValue, currentValue) {
    return ((currentValue - previousValue) / previousValue) * 100;
}

console.log(calculateGrowthPercentage(100, 150)); // 输出: 50

// 减少百分比计算
function calculateReductionPercentage(previousValue, currentValue) {
    return ((previousValue - currentValue) / previousValue) * 100;
}

console.log(calculateReductionPercentage(200, 150)); // 输出: 25

function calculatePercentage(part, whole) {
    let percentage = (part / whole) * 100;
    return Number(percentage.toFixed(2)); // 保留两位小数
}

function calculatePercentage(part, whole) {
    if (whole === 0) {
        throw new Error("分母不能为零");
    }
    return (part / whole) * 100;
}