js计算两个整数之间的百分比

    //计算两个整数之间的百分比
    //curNum：当前数据，totalNum：总数据，isHasPercentStr：是否返回%字符
    function getPercent(curNum, totalNum, isHasPercentStr) {
        curNum = parseFloat(curNum);
        totalNum = parseFloat(totalNum);

        if (isNaN(curNum) || isNaN(totalNum)) {
            return '-';
        }

        return isHasPercentStr ?
            totalNum <= 0 ? '0%' : (Math.round(curNum / totalNum * 10000) / 100.00 + '%') :
            totalNum <= 0 ? 0 : (Math.round(curNum / totalNum * 10000) / 100.00);
    }