Subtract 21/49 from 10/12
10/12 - 21/49 is 17/42.
Steps for subtracting fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 12 and 49 is 588
Next, find the equivalent fraction of both fractional numbers with denominator 588 - For the 1st fraction, since 12 × 49 = 588,
10/12 = 10 × 49/12 × 49 = 490/588 - Likewise, for the 2nd fraction, since 49 × 12 = 588,
21/49 = 21 × 12/49 × 12 = 252/588 - Subtract the two like fractions:
490/588 - 252/588 = 490 - 252/588 = 238/588 - After reducing the fraction, the answer is 17/42
MathStep (Works offline)
Download our mobile app and learn to work with fractions in your own time:
Android and iPhone/ iPad
Related: 20/12-21/49 10/12-42/49 10/24-21/49 10/12-21/98 30/12-21/49 10/12-63/49 10/36-21/49 50/12-21/49 10/60-21/49 70/12-21/49 10/84-21/49