Subtract 20/56 from 9/54
9/54 - 20/56 is -4/21.
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,
9/54 = 9 × 28/54 × 28 = 252/1512 - Likewise, for the 2nd fraction, since 56 × 27 = 1512,
20/56 = 20 × 27/56 × 27 = 540/1512 - Subtract the two like fractions:
252/1512 - 540/1512 = 252 - 540/1512 = -288/1512 - After reducing the fraction, the answer is -4/21
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