Subtract 49/20 from 9/7
1st number: 1 2/7, 2nd number: 2 9/20
9/7 - 49/20 is -163/140.
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,
9/7 = 9 × 20/7 × 20 = 180/140 - Likewise, for the 2nd fraction, since 20 × 7 = 140,
49/20 = 49 × 7/20 × 7 = 343/140 - Subtract the two like fractions:
180/140 - 343/140 = 180 - 343/140 = -163/140
MathStep (Works offline)
Download our mobile app and learn to work with fractions in your own time:
Android and iPhone/ iPad
Related: 18/7-49/20 9/7-98/20 9/14-49/20 9/7-49/40 27/7-49/20 9/21-49/20 9/7-49/60 45/7-49/20 9/35-49/20 63/7-49/20 9/49-49/20