Subtract 40/20 from 2/7
1st number: 2/7, 2nd number: 2 0/20
2/7 - 40/20 is -12/7.
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,
40/20 = 40 × 7/20 × 7 = 280/140 - Subtract the two like fractions:
40/140 - 280/140 = 40 - 280/140 = -240/140 - After reducing the fraction, the answer is -12/7
MathStep (Works offline)
Download our mobile app and learn to work with fractions in your own time:
Android and iPhone/ iPad
Related: 4/7-40/20 2/7-80/20 2/14-40/20 6/7-40/20 2/21-40/20 2/7-40/60 10/7-40/20 2/35-40/20 14/7-40/20 2/49-40/20