Subtract 42/56 from 20/27
20/27 - 42/56 is -1/108.
Steps for subtracting fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 27 and 56 is 1512
Next, find the equivalent fraction of both fractional numbers with denominator 1512 - For the 1st fraction, since 27 × 56 = 1512,
20/27 = 20 × 56/27 × 56 = 1120/1512 - Likewise, for the 2nd fraction, since 56 × 27 = 1512,
42/56 = 42 × 27/56 × 27 = 1134/1512 - Subtract the two like fractions:
1120/1512 - 1134/1512 = 1120 - 1134/1512 = -14/1512 - After reducing the fraction, the answer is -1/108
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