It is: 3/8
72 over 306 in lowest terms is 4/17
72 over 480 in lowest terms is 3/20
27/45 = 8/5
72 over 132 reduced to lowest terms is 6/11
72 over 132 in lowest terms is 6/11
144 over 122 in lowest terms is 72/61 or 111/61
48/72 = 2/3
12/72 = 1/6
9/10
4/9
6/5
8 over 72 = 1/9