Javascript for rounding down in a finance calculator

Question

I am trying to build a finance calculator but I can't get the function correct.

At the moment I have:

function calculatepay() {
  var months =  $('#fin_months').val();
  var amount =  $('#fin_amount').val();
  var deposit =  $('#fin_deposit').val();
  var result =  Math.round((amount - deposit) / months).toFixed(2);
  $('#fin_result').val(result);
  $
}

It will calculate 1000 / 12 as 83.00 - it should be 83.33.

Can anyone help me figure it out

Possible duplicate of [Round to at most 2 decimal places in JavaScript](http://stackoverflow.com/questions/11832914/round-to-at-most-2-decimal-places-in-javascript) — DibsyJr, Oct 24 '16 at 11:27

aliasav · Accepted Answer · 2016-10-24T11:40:38.813

1

You can do 2 things:

Remove Math.round and only us toFixed if you don't need rounding.
Use Math.round((amount-deposit/months)*100)/100

So basically, Math.round((1000/12)*100)/100 will give you 83.33

edited Oct 24 '16 at 11:40

answered Oct 24 '16 at 11:34

aliasav

3,048
4
25
30

Javascript for rounding down in a finance calculator

1 Answers1