Subtract 21/56 from 21/54
21/54 - 21/56 is 1/72.
Steps for subtracting fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 54 and 56 is 1512
Next, find the equivalent fraction of both fractional numbers with denominator 1512 - For the 1st fraction, since 54 × 28 = 1512,
21/54 = 21 × 28/54 × 28 = 588/1512 - Likewise, for the 2nd fraction, since 56 × 27 = 1512,
21/56 = 21 × 27/56 × 27 = 567/1512 - Subtract the two like fractions:
588/1512 - 567/1512 = 588 - 567/1512 = 21/1512 - After reducing the fraction, the answer is 1/72
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