Subtract 16/20 from 81/7
1st number: 11 4/7, 2nd number: 16/20
81/7 - 16/20 is 377/35.
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,
16/20 = 16 × 7/20 × 7 = 112/140 - Subtract the two like fractions:
1620/140 - 112/140 = 1620 - 112/140 = 1508/140 - After reducing the fraction, the answer is 377/35
- In mixed form: 1027/35
MathStep (Works offline)
Download our mobile app and learn to work with fractions in your own time:
Android and iPhone/ iPad
Related: 81/7-32/20 81/14-16/20 81/7-16/40 81/7-48/20 81/21-16/20 81/7-16/60 81/7-80/20 81/35-16/20 81/49-16/20