Subtract 7/42 from 3/27
3/27 - 7/42 is -1/18.
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,
3/27 = 3 × 14/27 × 14 = 42/378 - Likewise, for the 2nd fraction, since 42 × 9 = 378,
7/42 = 7 × 9/42 × 9 = 63/378 - Subtract the two like fractions:
42/378 - 63/378 = 42 - 63/378 = -21/378 - After reducing the fraction, the answer is -1/18
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