jQuery percentage calculation round up

Question

I have a payment form, the client requested an additional 2.5% charge on the total, after some playing I have come up with this:

$(document).ready(function(){
$('#amount').keyup(function(){
    $('#pay_amount').val($('#amount').val() * 1.025);
});   
});

You can see it working here: FIDDLE

My question/issue is can the total be rounded up/down to just two digits e.g. if you add the amount as "6" the total is: 6.1499999999999995 can this be 6.14 or rounded up to 6.15 Same if you enter "100"

Thanks

Answer 1

If you just need the formatted string, you can use value. toFixed(2) . If you need the value to remain a number, then use Math. round(value * 100)/100