Subtract 4/42 from 7/27
7/27 - 4/42 is 31/189.
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,
7/27 = 7 × 14/27 × 14 = 98/378 - Likewise, for the 2nd fraction, since 42 × 9 = 378,
4/42 = 4 × 9/42 × 9 = 36/378 - Subtract the two like fractions:
98/378 - 36/378 = 98 - 36/378 = 62/378 - After reducing the fraction, the answer is 31/189
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