Subtract 4/7 from 5/20
5/20 - 4/7 is -9/28.
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,
5/20 = 5 × 7/20 × 7 = 35/140 - Likewise, for the 2nd fraction, since 7 × 20 = 140,
4/7 = 4 × 20/7 × 20 = 80/140 - Subtract the two like fractions:
35/140 - 80/140 = 35 - 80/140 = -45/140 - After reducing the fraction, the answer is -9/28
MathStep (Works offline)
Download our mobile app and learn to work with fractions in your own time:
Android and iPhone/ iPad
Related: 10/20-4/7 5/20-8/7 5/40-4/7 5/20-4/14 15/20-4/7 5/20-12/7 5/60-4/7 5/20-4/21 25/20-4/7 5/20-20/7 5/20-4/35 35/20-4/7 5/20-28/7 5/20-4/49