0
Anonymous
12/21 - 7/21 = 5/21
Wiki User
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It is: 5/7 minus 1/4 = 13/28
24/7 - 13/7 = 11/7 or 1 and 4/7
7/12 minus 1/3 is 1/4.
1/3 minus 1/7 is 4/21.
4/21