Subtract 7/98 from 20/21
20/21 - 7/98 is 37/42.
Steps for subtracting fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 21 and 98 is 294
Next, find the equivalent fraction of both fractional numbers with denominator 294 - For the 1st fraction, since 21 × 14 = 294,
20/21 = 20 × 14/21 × 14 = 280/294 - Likewise, for the 2nd fraction, since 98 × 3 = 294,
7/98 = 7 × 3/98 × 3 = 21/294 - Subtract the two like fractions:
280/294 - 21/294 = 280 - 21/294 = 259/294 - After reducing the fraction, the answer is 37/42
MathStep (Works offline)
Download our mobile app and learn to work with fractions in your own time:
Android and iPhone/ iPad
Related: 40/21-7/98 20/21-14/98 20/42-7/98 60/21-7/98 20/21-21/98 20/63-7/98 20/21-35/98 20/21-49/98