Subtract 49/63 from 21/54
21/54 - 49/63 is -7/18.
Steps for subtracting fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 54 and 63 is 378
Next, find the equivalent fraction of both fractional numbers with denominator 378 - For the 1st fraction, since 54 × 7 = 378,
21/54 = 21 × 7/54 × 7 = 147/378 - Likewise, for the 2nd fraction, since 63 × 6 = 378,
49/63 = 49 × 6/63 × 6 = 294/378 - Subtract the two like fractions:
147/378 - 294/378 = 147 - 294/378 = -147/378 - After reducing the fraction, the answer is -7/18
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