Subtract 8/20 from 4/7
4/7 - 8/20 is 6/35.
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,
8/20 = 8 × 7/20 × 7 = 56/140 - Subtract the two like fractions:
80/140 - 56/140 = 80 - 56/140 = 24/140 - After reducing the fraction, the answer is 6/35
MathStep (Works offline)
Download our mobile app and learn to work with fractions in your own time:
Android and iPhone/ iPad
Related: 8/7-8/20 4/7-16/20 4/14-8/20 4/7-8/40 12/7-8/20 4/7-24/20 4/21-8/20 4/7-8/60 20/7-8/20 4/7-40/20 4/35-8/20 28/7-8/20 4/7-56/20 4/49-8/20