when z is divided by 8, the remainder is 5. What is the remainder when 4z is divided by 8. Can you please explain this to me step by step? I'm having difficulty understanding why the answer is 4

Answer 1

z/8=n+ 5/8
multiply by 4
4z/8=4n+20/8
but now you have a remainder of 20, and dividing it by 8 is 2r4
4z/8=(4n+2)+4/8
The term at the end is the remainder.