Subtract 21/20 from 7/98
1st number: 7/98, 2nd number: 1 1/20
7/98 - 21/20 is -137/140.
Steps for subtracting fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 98 and 20 is 980
Next, find the equivalent fraction of both fractional numbers with denominator 980 - For the 1st fraction, since 98 × 10 = 980,
7/98 = 7 × 10/98 × 10 = 70/980 - Likewise, for the 2nd fraction, since 20 × 49 = 980,
21/20 = 21 × 49/20 × 49 = 1029/980 - Subtract the two like fractions:
70/980 - 1029/980 = 70 - 1029/980 = -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: 14/98-21/20 7/98-42/20 7/98-21/40 21/98-21/20 7/98-63/20 7/98-21/60 35/98-21/20 49/98-21/20