Subtract 21/81 from 54/63
54/63 - 21/81 is 113/189.
Steps for subtracting fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 63 and 81 is 567
Next, find the equivalent fraction of both fractional numbers with denominator 567 - For the 1st fraction, since 63 × 9 = 567,
54/63 = 54 × 9/63 × 9 = 486/567 - Likewise, for the 2nd fraction, since 81 × 7 = 567,
21/81 = 21 × 7/81 × 7 = 147/567 - Subtract the two like fractions:
486/567 - 147/567 = 486 - 147/567 = 339/567 - After reducing the fraction, the answer is 113/189
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