Subtract 9/7 from 49/20
1st number: 2 9/20, 2nd number: 1 2/7
49/20 - 9/7 is 163/140.
Steps for subtracting fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 20 and 7 is 140
Next, find the equivalent fraction of both fractional numbers with denominator 140 - For the 1st fraction, since 20 × 7 = 140,
49/20 = 49 × 7/20 × 7 = 343/140 - Likewise, for the 2nd fraction, since 7 × 20 = 140,
9/7 = 9 × 20/7 × 20 = 180/140 - Subtract the two like fractions:
343/140 - 180/140 = 343 - 180/140 = 163/140 - In mixed form: 123/140
MathStep (Works offline)
Download our mobile app and learn to work with fractions in your own time:
Android and iPhone/ iPad
Related: 98/20-9/7 49/20-18/7 49/40-9/7 49/20-9/14 49/20-27/7 49/60-9/7 49/20-9/21 49/20-45/7 49/20-9/35 49/20-63/7 49/20-9/49