Subtract 8/7 from 56/21
1st number: 2 14/21, 2nd number: 1 1/7
56/21 - 8/7 is 32/21.
Steps for subtracting fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 21 and 7 is 21
Next, find the equivalent fraction of both fractional numbers with denominator 21 - For the 1st fraction, since 21 × 1 = 21,
56/21 = 56 × 1/21 × 1 = 56/21 - Likewise, for the 2nd fraction, since 7 × 3 = 21,
8/7 = 8 × 3/7 × 3 = 24/21 - Subtract the two like fractions:
56/21 - 24/21 = 56 - 24/21 = 32/21 - In mixed form: 111/21
MathStep (Works offline)
Download our mobile app and learn to work with fractions in your own time:
Android and iPhone/ iPad
Related: 56/21-16/7 56/42-8/7 56/21-8/14 56/21-24/7 56/63-8/7 56/21-8/21 56/21-40/7 56/21-8/35 56/21-56/7 56/21-8/49