7 over 12 minus 1 over 4 = 1 over 3 = 0.33
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First, you have to make the denominators the same. 7 4 --- - --- 12 12 Then, you subtract. 7 4 3 1 --- - --- = --- = --- 12 12 12 4
7/12 minus 1/3 = 1/4
(10/12) - (1/4) = (10/12) - (3/12) = 7/12
1/4 + 1/3 = 3/12 + 4/12 (12 is the least common multiple of 3 and 4) = 7/12
(-7/12) / (-3/4) = (7/12) / (3/4) = (7/12) * (4/3) = (7/3)*(1/3) = 7/9