Subtract 90/7 from 2/20
1st number: 2/20, 2nd number: 12 6/7
2/20 - 90/7 is -893/70.
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,
2/20 = 2 × 7/20 × 7 = 14/140 - Likewise, for the 2nd fraction, since 7 × 20 = 140,
90/7 = 90 × 20/7 × 20 = 1800/140 - Subtract the two like fractions:
14/140 - 1800/140 = 14 - 1800/140 = -1786/140 - After reducing the fraction, the answer is -893/70
MathStep (Works offline)
Download our mobile app and learn to work with fractions in your own time:
Android and iPhone/ iPad
Related: 4/20-90/7 2/40-90/7 2/20-90/14 6/20-90/7 2/60-90/7 2/20-90/21 10/20-90/7 2/20-90/35 14/20-90/7 2/20-90/49