Subtract 42/49 from 18/84
18/84 - 42/49 is -9/14.
Steps for subtracting fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 84 and 49 is 588
Next, find the equivalent fraction of both fractional numbers with denominator 588 - For the 1st fraction, since 84 × 7 = 588,
18/84 = 18 × 7/84 × 7 = 126/588 - Likewise, for the 2nd fraction, since 49 × 12 = 588,
42/49 = 42 × 12/49 × 12 = 504/588 - Subtract the two like fractions:
126/588 - 504/588 = 126 - 504/588 = -378/588 - After reducing the fraction, the answer is -9/14
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