Yes: 4/9
47/72 is already simplified
It is: 72/96 = 3/4 simplified
-13/72 cannot be simplified.
55/72
32 over 21 (32/21) cannot be further simplified.
No.
It is already simplified.
10/32, when simplified, is equivalent to 5/16.
72/100 = 18/25
72/83 is simplified.
It is 72/100, which can be simplified, if required.