Subtract 16/49 from 21/84
21/84 - 16/49 is -15/196.
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,
21/84 = 21 × 7/84 × 7 = 147/588 - Likewise, for the 2nd fraction, since 49 × 12 = 588,
16/49 = 16 × 12/49 × 12 = 192/588 - Subtract the two like fractions:
147/588 - 192/588 = 147 - 192/588 = -45/588 - After reducing the fraction, the answer is -15/196
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