I am looking for an efficient way to cut floating number at Javascript which are long. I need this because my output for taking percentage of two numbers can be sometimes like 99.4444444 while I am only interested in the first 2 digits after "." such as 99.44

My current percentage taking function for 2 numbers:

function takePercentage(x,y){
     return (x /y) * 100;
}

I am looking for an efficient way to cut floating number at Javascript which are long. I need this because my output for taking percentage of two numbers can be sometimes like 99.4444444 while I am only interested in the first 2 digits after "." such as 99.44

My current percentage taking function for 2 numbers:

function takePercentage(x,y){
     return (x /y) * 100;
}

• javascript
• floating-point

Share Improve this question Follow edited Jan 3, 2015 at 22:23 Stephan Muller 27.6k1818 gold badges8686 silver badges127127 bronze badges asked Sep 22, 2009 at 15:38 HellnarHellnar 65k8282 gold badges208208 silver badges282282 bronze badges

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3 Answers 3

Sorted by: Reset to default 7

You can use number.toFixed:

function takePercentage(x,y){
     return ((x /y) * 100).toFixed(2);
}

How about this:

Math.round( myfloatvalue*100 ) / 100

function takePercentage(x,y){
     n = (x /y) * 100;
     return n.toPrecision(2);
}

That should do it!