0
Anonymous
19/21 - 4/12 (4/12 = 1/3) = 12/21
Convert the 1/3 into 7/21 and subtract.
Wiki User
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13/21 - 7/21 = 6/21 Sorry, DJ, 4 over 7 = 12/21 so answer is 5/21
16/21 minus two equals -1 5/21
9
12 minus 33 is -21.
12