Yes, easy way to tell: they're both even.
34/72=17/36
34/85 is simplified
47/72 is already simplified
It is: 72/96 = 3/4 simplified
-13/72 cannot be simplified.
55/72
It is simplified as 1 over 2.
No.
It is 72/100, which can be simplified, if required.
Simplified.. 48/72 = 2/3
52/72 = 13/18
72/83 is simplified.
72/100 = 18/25