It is 72/100, which can be simplified, if required.
Yes, 72/80 simplifies to 9/10
47/72 is already simplified
It is: 72/96 = 3/4 simplified
-13/72 cannot be simplified.
55/72
No.
72/100 = 18/25
72/83 is simplified.
52/72 = 13/18
Simplified.. 48/72 = 2/3
It is: 72/66 = 12/11