99.0000000000000005% of the time floating point math is perfect. The rest of the time we have this problem:

>> 0.1 + 0.2
0.30000000000000004

This solves that problem.

>> fixAfloat(0.1 + 0.2)
0.3

npm install fix-a-float

var fixAfloat = require('fix-a-float');

console.log(fixAfloat(0.1+0.2));

It converts the number to a string, looks for a long run of zeros or nines at the end, removes them, and coverts back to a float.

Absolutely not. Only use it in places where you need human readable numbers but don't know the precision you need. It doesn't actually solve any of the larger issues with floats.