Subtract 10/20 from 5/7
5/7 - 10/20 is 3/14.
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,
5/7 = 5 × 20/7 × 20 = 100/140 - Likewise, for the 2nd fraction, since 20 × 7 = 140,
10/20 = 10 × 7/20 × 7 = 70/140 - Subtract the two like fractions:
100/140 - 70/140 = 100 - 70/140 = 30/140 - After reducing the fraction, the answer is 3/14
MathStep (Works offline)
Download our mobile app and learn to work with fractions in your own time:
Android and iPhone/ iPad
Related: 10/7-10/20 5/14-10/20 5/7-10/40 15/7-10/20 5/7-30/20 5/21-10/20 5/7-10/60 25/7-10/20 5/7-50/20 5/35-10/20 35/7-10/20 5/7-70/20 5/49-10/20