Respuesta :

1. 4/7 2. 1/2 3. 28/105 4. 20 or 20/1

5. 12 or 12/1 6. 9 or 9/1 7. 33/30 or 1 3/30

8. 16/60 or 4/15 9. 15/20 or 3/4

10. 10/24 or 5/12 11. 4 19/24

12. 68/45 or 1 23/45 13. 3/4 of time

14. 1/8 (not 100% sure)