JS floating point causing incorrect rounding

I have what may be an edge case scenario. When trying to round the value `4.015` to 2 decimal places, I always end up with `4.01` instead of the expected `4.02`. This happens consistently for all numbers with `.015` as the decimal portion. I round using a fairly common method in JS: ``` val = Math.round(val * 100) / 100; ``` I think the problem starts when multiplying by 100. The floating point inaccuracy causes this value to be rounded down rather than up. ``` var a = 4.015, // 4.015 mult = a * 100, // 401.49999999999994 (the issue) round = Math.round(mult), // 401 result = round / 100; // 4.01 (expected 4.02) ``` Fiddle: http://jsfiddle.net/eVXRL/ This problem does not happen if I try to round `4.025`. The expected value of `4.03` does return; it's only an issue with `.015` (so far). Is there a way to elegantly resolve this? There is of course the hack of just looking for `.015` and handling that case one-off, but that just seems wrong!