1/3 + 2/7
13/21
4/20 + 3/5
16/20 or 4/5
3/16 + 1/2
11/16
10/15 + 4/5
22/15
5/6 + 3/5
43/30
2/3 + 1/9
7/9
3/15 + 1/3
8/15
1/2 + 1/18
10/18 or 5/9
6/12 + 1/5
42/60 or 21/30
1/4 + 2/8
4/8 or 1/4
1/7 + 1/2
9/14
2/9 + 4/6
16/18 or 8/9
3/15 + 4/5
15/15 or 1
4/6 + 2/3
8/6 or 4/3 or 1 and 1/3
2/7 + 3/14
7/14 or 1/7
2/12 + 2/4
8/12 or 2/3
2/25 + 3/5
17/25
5/10 + 1/2
10/10 or 1
2/9 + 3/6
13/9
6/10 + 1/2
11/10
4/6 + 1/18
13/18