It’s really simple once you know how to solve. I’ll use problem c to show you how.
5/8 / 3/4
Multiply by the reciprocal. (Just flip 3/4 upside down and change the sign)
5/8 x 4/3
Multiply:
20/24
Simplify:
5/6 (answer to c)
Let me know if this helped. I can help with the other problems if you need it!