6/13
No, 13/18 cannot be simplified as 13 is a prime number.
It is: 26/18 = 13/9
Anytime your top number is bigger then your bottom number, it can be simplified. So 31/18 = 1 R 13, so you would write that as 1 and 13 over 18.
52/72 = 13/18
It can not be simplified further.
13/9 cannot be simplified.
18 over 48 simplified is 3 over 8
When simplifying 5 13/18, the answer will be 103/18.
87/18 = 29/6 when simplified
241/18 cannot be simplified further.
109/18 cannot be simplified further.