32/20 fully reduced in prime numbers

8/5

Step-by-step explanation:

32/20, divide by 2, 16/10, divide by 2,8/5.

This is the lowest you can go

1 12/20 or 1 6/10.

Step-by-step explanation:

You would want to take the 32, divide it into 20. That gives you one, so it is one whole. You have 12 remaining, so that's what you would put for the part over 20. The answer is 1 12/20. This can be simplified into 1 6/10, of course.