which comes next

1/3, 4/9, 5/9 -----

4/40, 2/5,

3/7, 8/14, 5/7

choices
2/3, 1/5, 36/42, 8/28,

---- = 6/9 = 2/3

4/40 = 1/10

2/5 = 4/10

8/14 = 4/7