Subtract 21/49 from 12/84
12/84 - 21/49 is -2/7.
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,
12/84 = 12 × 7/84 × 7 = 84/588 - Likewise, for the 2nd fraction, since 49 × 12 = 588,
21/49 = 21 × 12/49 × 12 = 252/588 - Subtract the two like fractions:
84/588 - 252/588 = 84 - 252/588 = -168/588 - After reducing the fraction, the answer is -2/7
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