Subtract 21/42 from 49/56
49/56 - 21/42 is 3/8.
Steps for subtracting fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 56 and 42 is 168
Next, find the equivalent fraction of both fractional numbers with denominator 168 - For the 1st fraction, since 56 × 3 = 168,
49/56 = 49 × 3/56 × 3 = 147/168 - Likewise, for the 2nd fraction, since 42 × 4 = 168,
21/42 = 21 × 4/42 × 4 = 84/168 - Subtract the two like fractions:
147/168 - 84/168 = 147 - 84/168 = 63/168 - After reducing the fraction, the answer is 3/8
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