zero!
3 4/7 minus 1/7 is 3 3/7
-3 3/7
7/9 minus 3/4 is 1/36
1/2 minus 3/7 is 1/14
4/7 minus 3/4 is -5/28
7/12 minus 1/3 = 1/4
The answer is 3 over 7.
43 minus 27 3/7 = 15 4/7
51 minus 27 3/7 = 23 4/7
11/12 minus 7/12 is 1/3
2 and 3/7 minus 8/14 = 13/7 or 1 and 6/7
It is 13/72 minus 3/8 = -7/36