6/9 + 15/25 - 8/15=
6 + 5 1/3 - 4 1/6 - 1 1/2 =
9 - 5 1/6 + 4 1/12 =
7/12 + 5/9 - 4/24 =
2/3+ 5/6 -1/12=
35/36
7 11/12
11/15
1 5/12
5 2/3
