Subtract 2/20 from 8/7
1st number: 1 1/7, 2nd number: 2/20
8/7 - 2/20 is 73/70.
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,
8/7 = 8 × 20/7 × 20 = 160/140 - Likewise, for the 2nd fraction, since 20 × 7 = 140,
2/20 = 2 × 7/20 × 7 = 14/140 - Subtract the two like fractions:
160/140 - 14/140 = 160 - 14/140 = 146/140 - After reducing the fraction, the answer is 73/70
- In mixed form: 13/70
MathStep (Works offline)
Download our mobile app and learn to work with fractions in your own time:
Android and iPhone/ iPad
Related: 16/7-2/20 8/7-4/20 8/14-2/20 8/7-2/40 24/7-2/20 8/7-6/20 8/21-2/20 8/7-2/60 40/7-2/20 8/7-10/20 8/35-2/20 56/7-2/20 8/7-14/20 8/49-2/20