13 - 1/5 = 12 4/5
13/20 minus 3/5 is 1/20
2/3 is.
13 over 45
5/8 - 1/12 = 13/24
It is: 5/6 minus 6/13 = 29/78
20 over 13
It is: 4/7 minus 5/12 = 13/84
7/11 minus 2/5 is 13/55
2/5 minus 1/15 is 1/3
7/9 − 5/13 = 46/117
13/30
4/7 minus 5/12 = 13/84