Subtract 21/98 from 10/84
10/84 - 21/98 is -2/21.
Steps for subtracting fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 84 and 98 is 588
Next, find the equivalent fraction of both fractional numbers with denominator 588 - For the 1st fraction, since 84 × 7 = 588,
10/84 = 10 × 7/84 × 7 = 70/588 - Likewise, for the 2nd fraction, since 98 × 6 = 588,
21/98 = 21 × 6/98 × 6 = 126/588 - Subtract the two like fractions:
70/588 - 126/588 = 70 - 126/588 = -56/588 - After reducing the fraction, the answer is -2/21
MathStep (Works offline)
Download our mobile app and learn to work with fractions in your own time:
Android and iPhone/ iPad
Related: 20/84-21/98 10/84-42/98 30/84-21/98 10/84-63/98 50/84-21/98 70/84-21/98