Subtract 6/9 from 12/42
12/42 - 6/9 is -8/21.
Steps for subtracting fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 42 and 9 is 126
Next, find the equivalent fraction of both fractional numbers with denominator 126 - For the 1st fraction, since 42 × 3 = 126,
12/42 = 12 × 3/42 × 3 = 36/126 - Likewise, for the 2nd fraction, since 9 × 14 = 126,
6/9 = 6 × 14/9 × 14 = 84/126 - Subtract the two like fractions:
36/126 - 84/126 = 36 - 84/126 = -48/126 - After reducing the fraction, the answer is -8/21
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