Subtract 27/42 from 12/24
12/24 - 27/42 is -1/7.
Steps for subtracting fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 24 and 42 is 168
Next, find the equivalent fraction of both fractional numbers with denominator 168 - For the 1st fraction, since 24 × 7 = 168,
12/24 = 12 × 7/24 × 7 = 84/168 - Likewise, for the 2nd fraction, since 42 × 4 = 168,
27/42 = 27 × 4/42 × 4 = 108/168 - Subtract the two like fractions:
84/168 - 108/168 = 84 - 108/168 = -24/168 - After reducing the fraction, the answer is -1/7
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