Subtract 5/20 from 9/7
1st number: 1 2/7, 2nd number: 5/20
9/7 - 5/20 is 29/28.
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,
5/20 = 5 × 7/20 × 7 = 35/140 - Subtract the two like fractions:
180/140 - 35/140 = 180 - 35/140 = 145/140 - After reducing the fraction, the answer is 29/28
- In mixed form: 11/28
MathStep (Works offline)
Download our mobile app and learn to work with fractions in your own time:
Android and iPhone/ iPad
Related: 18/7-5/20 9/7-10/20 9/14-5/20 9/7-5/40 27/7-5/20 9/7-15/20 9/21-5/20 9/7-5/60 45/7-5/20 9/7-25/20 9/35-5/20 63/7-5/20 9/7-35/20 9/49-5/20