Answer:
1. 9/40
2. 4/12 or 1/3
3. 2/12 or 1/6
4. 5/10 or 1/2
5. 2/6 or 1/3
6. 21/50
7. 2/10 or 1/5
8. 2/15
9. 1/20
10. 6/15
11. 2/10 or 1/5
12. 6/20
13. 1/6
14. 5/50 or 1/10
15. 18/50
