Subtract 7/98 from 21/20
1st number: 1 1/20, 2nd number: 7/98
21/20 - 7/98 is 137/140.
Steps for subtracting fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 20 and 98 is 980
Next, find the equivalent fraction of both fractional numbers with denominator 980 - For the 1st fraction, since 20 × 49 = 980,
21/20 = 21 × 49/20 × 49 = 1029/980 - Likewise, for the 2nd fraction, since 98 × 10 = 980,
7/98 = 7 × 10/98 × 10 = 70/980 - Subtract the two like fractions:
1029/980 - 70/980 = 1029 - 70/980 = 959/980 - After reducing the fraction, the answer is 137/140
MathStep (Works offline)
Download our mobile app and learn to work with fractions in your own time:
Android and iPhone/ iPad
Related: 42/20-7/98 21/20-14/98 21/40-7/98 63/20-7/98 21/20-21/98 21/60-7/98 21/20-35/98 21/20-49/98