Modulo should work with fractions

[CodedK]

[New feature/Bug] It would be very helpful if modulo worked with decimal numbers. I would use it as a way to keep the decimal or integer part of a number, e.g.

mod(3.89, 1) should return "0.89". (decimal part) 3.89-mod(3.89, 1) should return "3" (integer part)