Subtract 21/49 from 6/84
6/84 - 21/49 is -5/14.
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,
6/84 = 6 × 7/84 × 7 = 42/588 - Likewise, for the 2nd fraction, since 49 × 12 = 588,
21/49 = 21 × 12/49 × 12 = 252/588 - Subtract the two like fractions:
42/588 - 252/588 = 42 - 252/588 = -210/588 - After reducing the fraction, the answer is -5/14
MathStep (Works offline)
Download our mobile app and learn to work with fractions in your own time:
Android and iPhone/ iPad
Related: 12/84-21/49 6/84-42/49 6/84-21/98 18/84-21/49 6/84-63/49 30/84-21/49 42/84-21/49