Subtract 15/49 from 20/84
20/84 - 15/49 is -10/147.
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,
20/84 = 20 × 7/84 × 7 = 140/588 - Likewise, for the 2nd fraction, since 49 × 12 = 588,
15/49 = 15 × 12/49 × 12 = 180/588 - Subtract the two like fractions:
140/588 - 180/588 = 140 - 180/588 = -40/588 - After reducing the fraction, the answer is -10/147
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