jQuery limit number of numbers after

Hi I am trying to work out the best way to do the following

say I开发者_如何学Go sell an item for 22.55 the GST on that is 10% which = 2.25 However it seems when I run the following

var sum = (.10 * 22.55);

it returns $2.250000002 How do I make it so it only shows the real dollars? $2.25

Thanks

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You can use the .toFixed() method.

Example

var val = 24.36257;

val.toFixed(2) 

will return 24.36

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Try the toFixed method: http://www.w3schools.com/jsref/jsref_tofixed.asp