Rounding numbers with decimals. For Round, Floor and Ceil.

RoundNumbersDecimal.js

function roundNumber(num, dec) {
    return Math.round(num * Math.pow(10, dec)) / Math.pow(10, dec);
}

function floorNumber(num, dec) {
    return roundNumber(num - (5 / Math.pow(10, dec + 1)), dec);
}

function ceilNumber(num, dec) {
    var numStr = num.toString();
    var decCount = (numStr.split('.')[1] || []).length;
    return roundNumber(num + (5 / Math.pow(10, dec + 1)) - (1 / Math.pow(10, dec + decCount)), dec);
}

Example Number: 155.02

ceilNumber(155.02, 2) --> 155.02

Math.ceil(155.02 * Math.pow(10, 2)) / Math.pow(10, 2) --> 155.03