The simplest form of 45/72 is 5 over 8.
9/72 is equal to 1/8, and that is the simplest form.1/8
72/81 = 8/9
6 over 8
7 over 8
It is: 72/171 = 8/19 simplified
8/17
-1/8
8/9
GCD(45, 72) = 9 so the simplest form is (45/9) / (72/9) = 5/8
27/72 = 3/83/8
8/7