javascript 计算两个整数的百分比值

///计算两个整数的百分比值 
function GetPercent(num, total) { 
num = parseFloat(num); 
total = parseFloat(total); 
if (isNaN(num) || isNaN(total)) { 
return "-"; 
} 
return total <= 0 ? "0%" : (Math.round(num / total * 10000) / 100.00 + "%"); 
}