Use parseFloat and toFixed(10) to avoid floating point noise.
120 - 80 % — Wait, CalcSimple doesn’t do two-number percent difference directly. Instead: 120 / 80 * 100 - 100 = → (120 is 50% more than 80). calcsimple
If you are on a Unix-like system, use type or which to see if it is a program or a script file. Use parseFloat and toFixed(10) to avoid floating point noise