Question

How to express a remainder in a whole number

Answer 1

You could do it 3 ways.
I'm going to use 20 with a remainder of 5 for an example:
1) 20r5
2) 20 1/4 (5/20 reduced)
3) 20.25

Hope that helps!

(Probably if you are just doing a remainder it would be way #1. )