Subtract 49/20 from 4/7
1st number: 4/7, 2nd number: 2 9/20
4/7 - 49/20 is -263/140.
Steps for subtracting fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 7 and 20 is 140
Next, find the equivalent fraction of both fractional numbers with denominator 140 - For the 1st fraction, since 7 × 20 = 140,
4/7 = 4 × 20/7 × 20 = 80/140 - Likewise, for the 2nd fraction, since 20 × 7 = 140,
49/20 = 49 × 7/20 × 7 = 343/140 - Subtract the two like fractions:
80/140 - 343/140 = 80 - 343/140 = -263/140
MathStep (Works offline)
Download our mobile app and learn to work with fractions in your own time:
Android and iPhone/ iPad
Related: 8/7-49/20 4/7-98/20 4/14-49/20 4/7-49/40 12/7-49/20 4/21-49/20 4/7-49/60 20/7-49/20 4/35-49/20 28/7-49/20 4/49-49/20