It is 13/72 minus 3/8 = -7/36
22/72 + 3/72 = 25/72
13/20 minus 3/5 is 1/20
72 minus 3/4 is 71 1/4
19/20 minus 3/10 = 13/20
13 over 35
13 over 63.
2/3 is.
2 + 3 - 72 = -67
13/16 − 3/4 = 4/64 which can be reduced to 1/16
7 and one third minus 3 and 9 tenths is six and 13 over 30 3 and 13/30
8/9 − 3/5 = 13/45
11/15 minus 3/10 = 13/30