Rise over run.
So for 4/7 go up on the y axis 4 and to the right on the x axis 7.
8/12: you can simplify this to 2/3 so go up 2 right 3 or up 8 right 12
16/18: optional simplify 8/9 so up 8 right 9 or up 16 and right 18
24/25: up 24 right 25
32/32: this is equal to 1 so up one right one, or up 32 right 32
