js计算两个整数之间的百分比

1     //计算两个整数之间的百分比
 2     //curNum：当前数据，totalNum：总数据，isHasPercentStr：是否返回%字符
 3     function getPercent(curNum, totalNum, isHasPercentStr) {
 4         curNum = parseFloat(curNum);
 5         totalNum = parseFloat(totalNum);
 6 
 7         if (isNaN(curNum) || isNaN(totalNum)) {
 8             return '-';
 9         }
10 
11         return isHasPercentStr ?
12             totalNum <= 0 ? '0%' : (Math.round(curNum / totalNum * 10000) / 100.00 + '%') :
13             totalNum <= 0 ? 0 : (Math.round(curNum / totalNum * 10000) / 100.00);
14     }