Subtract 27/42 from 27/54
27/54 - 27/42 is -1/7.
Steps for subtracting fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 54 and 42 is 378
Next, find the equivalent fraction of both fractional numbers with denominator 378 - For the 1st fraction, since 54 × 7 = 378,
27/54 = 27 × 7/54 × 7 = 189/378 - Likewise, for the 2nd fraction, since 42 × 9 = 378,
27/42 = 27 × 9/42 × 9 = 243/378 - Subtract the two like fractions:
189/378 - 243/378 = 189 - 243/378 = -54/378 - After reducing the fraction, the answer is -1/7
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