Subtract 2/20 from 81/7
1st number: 11 4/7, 2nd number: 2/20
81/7 - 2/20 is 803/70.
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,
81/7 = 81 × 20/7 × 20 = 1620/140 - Likewise, for the 2nd fraction, since 20 × 7 = 140,
2/20 = 2 × 7/20 × 7 = 14/140 - Subtract the two like fractions:
1620/140 - 14/140 = 1620 - 14/140 = 1606/140 - After reducing the fraction, the answer is 803/70
- In mixed form: 1133/70
MathStep (Works offline)
Download our mobile app and learn to work with fractions in your own time:
Android and iPhone/ iPad
Related: 81/7-4/20 81/14-2/20 81/7-2/40 81/7-6/20 81/21-2/20 81/7-2/60 81/7-10/20 81/35-2/20 81/7-14/20 81/49-2/20