what does that mean???
It means you need to reduce it into a smaller form. Akadivide both the numerator and the denominator by a common factor. So 4/8 would be 1/2 (common factor = 4) 5/20 would be 1/5 (common factor = 5)
To make smaller by dividing 4/8 = 1/25/20 = 1/4