Subtract 27/21 from 20/54
1st number: 20/54, 2nd number: 1 6/21
20/54 - 27/21 is -173/189.
Steps for subtracting fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 54 and 21 is 378
Next, find the equivalent fraction of both fractional numbers with denominator 378 - For the 1st fraction, since 54 × 7 = 378,
20/54 = 20 × 7/54 × 7 = 140/378 - Likewise, for the 2nd fraction, since 21 × 18 = 378,
27/21 = 27 × 18/21 × 18 = 486/378 - Subtract the two like fractions:
140/378 - 486/378 = 140 - 486/378 = -346/378 - After reducing the fraction, the answer is -173/189
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