You divide both parts by their highest common factor, which is 6. That gives you 6 over 17.
You cannot simplify 31 over 36 because 31 is prime.
The GCF of 36 and 102 is 6. 36/102 = 6/17
you do
1 1/16
Yes
36/8 = 9/2
one over two
36/42
36/24=3/2
45/36 = 5/4
3/7
17/18