Subtract 42/54 from 20/56
20/56 - 42/54 is -53/126.
Steps for subtracting fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 56 and 54 is 1512
Next, find the equivalent fraction of both fractional numbers with denominator 1512 - For the 1st fraction, since 56 × 27 = 1512,
20/56 = 20 × 27/56 × 27 = 540/1512 - Likewise, for the 2nd fraction, since 54 × 28 = 1512,
42/54 = 42 × 28/54 × 28 = 1176/1512 - Subtract the two like fractions:
540/1512 - 1176/1512 = 540 - 1176/1512 = -636/1512 - After reducing the fraction, the answer is -53/126
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