2/3+2/3
3/4+2/5
6/9+3/9
8/12+2/12
5/3+5/2
9/18+3/18
7/5+8/2
2/6+3/5
9/9= 1
4/3
25/6
23/20
12/18
54/10
28/30
10/12
