11. 3 × 2/7 =

12. 4/5 × 10/12 =

13. 1/2 × 9 × 6/12 =

14. 3 2/5 × 2 1/4 =

15. 2 2/6 × 5 1/7 =

16. 6 ÷ 2/3 =

17. 7/9 ÷ 14 =

18. 4/6 ÷ 5/8 =

19. 2 1/4 ÷ 5 3/5 =

20. 4 2/7 ÷ 2 1/14 =