Rounding issue in Math.round() & .toFixed()

Question

I used below two methods :

Number.prototype.myRound = function (decimalPlaces) {
    var multiplier = Math.pow(10, decimalPlaces);

    return (Math.round(th         


        

Answer 1

The problem is probably floating point inaccuracy, thus you might get different results in different cases (different gathering of a number, different browsers etc.).

See also this: toFixed(2) rounds "x.525" inconsistently?