Subtract 10/20 from 2/7
2/7 - 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,
2/7 = 2 × 20/7 × 20 = 40/140 - Likewise, for the 2nd fraction, since 20 × 7 = 140,
10/20 = 10 × 7/20 × 7 = 70/140 - Subtract the two like fractions:
40/140 - 70/140 = 40 - 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: 4/7-10/20 2/14-10/20 2/7-10/40 6/7-10/20 2/7-30/20 2/21-10/20 2/7-10/60 10/7-10/20 2/7-50/20 2/35-10/20 14/7-10/20 2/7-70/20 2/49-10/20