Subtract 21/20 from 15/98
1st number: 15/98, 2nd number: 1 1/20
15/98 - 21/20 is -879/980.
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,
15/98 = 15 × 10/98 × 10 = 150/980 - Likewise, for the 2nd fraction, since 20 × 49 = 980,
21/20 = 21 × 49/20 × 49 = 1029/980 - Subtract the two like fractions:
150/980 - 1029/980 = 150 - 1029/980 = -879/980
MathStep (Works offline)
Download our mobile app and learn to work with fractions in your own time:
Android and iPhone/ iPad
Related: 30/98-21/20 15/98-42/20 15/98-21/40 45/98-21/20 15/98-63/20 15/98-21/60 75/98-21/20