Well, honey, simplifying 31 over 36 is like trying to fit into your high school jeans after Thanksgiving dinner. You just divide the top and bottom by the greatest common factor, which in this case is 1. So, 31 over 36 stays as is because there's no simpler way to write it.
you do
Yes
36/8 = 9/2
divide by 19
2/3
one over two
36/42
36/38 = 18/19
Divide both by the same number. 38 over 133 38 divided by 38 over 133 divided by 38 1 over 3 1 third
36/24=3/2
45/36 = 5/4