45/36, ?, 15/10
1/3, 7/12, ?.
1/2, 2/4, ?, 4/8, 7/14, 8/16.
1/6, 1/3, 3/6, ?, 5/6, 1 1/6
4/5, 6/5, 8/10, 26/17, ?
21/28
3/6
44/90
4/3
10/12
