Question

im getting a little issue here. Im trying to do a simple math, but im forgetting something.

Here’s what:

var valorOriginal = 9.90;

var discount = Math.round(valorOriginal*12*0.25);
var anual = Math.round(valorOriginal*12)-discount;

alert(anual);

If you do this math on calc, it will give you 89.1, but im just getting 89 rounded. Whats wrong?

Thanks!

Answer 1

Math.round rounds up to the nearest integer value. So you will loose the decimal points. If you want the decimal, you are probably after toFixed().

var valorOriginal = 9.90;

var discount = (valorOriginal*12*0.25);
var anual = (valorOriginal*12)-discount;

alert( anual.toFixed(2) );