Subtract 56/21 from 81/14
1st number: 5 11/14, 2nd number: 2 14/21
81/14 - 56/21 is 131/42.
Steps for subtracting fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 14 and 21 is 42
Next, find the equivalent fraction of both fractional numbers with denominator 42 - For the 1st fraction, since 14 × 3 = 42,
81/14 = 81 × 3/14 × 3 = 243/42 - Likewise, for the 2nd fraction, since 21 × 2 = 42,
56/21 = 56 × 2/21 × 2 = 112/42 - Subtract the two like fractions:
243/42 - 112/42 = 243 - 112/42 = 131/42 - In mixed form: 35/42
MathStep (Works offline)
Download our mobile app and learn to work with fractions in your own time:
Android and iPhone/ iPad
Related: 81/28-56/21 81/14-56/42 81/42-56/21 81/14-56/63 81/70-56/21 81/98-56/21