The answers are:
5/4
4/3
5/8
They are equal/even
3/10
2/3 or 5/4–> 8/12 or 15/12. 15/12 is bigger
1/2 or 4/3–> 3/6 or 8/6. 8/6 is bigger
5/8 or 2/3–> 15/24 or 14/24. 15/24 is bigger
3/12 or 6/24–> 6/24 or 6/24. They are equal
3/10 or 1/4–>6/20 or 5/20. 6/20 is bigger.