Subtract 20/56 from 42/49
42/49 - 20/56 is 1/2.
Steps for subtracting fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 49 and 56 is 392
Next, find the equivalent fraction of both fractional numbers with denominator 392 - For the 1st fraction, since 49 × 8 = 392,
42/49 = 42 × 8/49 × 8 = 336/392 - Likewise, for the 2nd fraction, since 56 × 7 = 392,
20/56 = 20 × 7/56 × 7 = 140/392 - Subtract the two like fractions:
336/392 - 140/392 = 336 - 140/392 = 196/392 - After reducing the fraction, the answer is 1/2
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