Subtract 21/49 from 3/56
3/56 - 21/49 is -3/8.
Steps for subtracting fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 56 and 49 is 392
Next, find the equivalent fraction of both fractional numbers with denominator 392 - For the 1st fraction, since 56 × 7 = 392,
3/56 = 3 × 7/56 × 7 = 21/392 - Likewise, for the 2nd fraction, since 49 × 8 = 392,
21/49 = 21 × 8/49 × 8 = 168/392 - Subtract the two like fractions:
21/392 - 168/392 = 21 - 168/392 = -147/392 - After reducing the fraction, the answer is -3/8
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