Subtract 20/42 from 4/27
4/27 - 20/42 is -62/189.
Steps for subtracting fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 27 and 42 is 378
Next, find the equivalent fraction of both fractional numbers with denominator 378 - For the 1st fraction, since 27 × 14 = 378,
4/27 = 4 × 14/27 × 14 = 56/378 - Likewise, for the 2nd fraction, since 42 × 9 = 378,
20/42 = 20 × 9/42 × 9 = 180/378 - Subtract the two like fractions:
56/378 - 180/378 = 56 - 180/378 = -124/378 - After reducing the fraction, the answer is -62/189
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