Subtract 21/7 from 56/3
1st number: 18 2/3, 2nd number: 3 0/7
56/3 - 21/7 is 47/3.
Steps for subtracting fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 3 and 7 is 21
Next, find the equivalent fraction of both fractional numbers with denominator 21 - For the 1st fraction, since 3 × 7 = 21,
56/3 = 56 × 7/3 × 7 = 392/21 - Likewise, for the 2nd fraction, since 7 × 3 = 21,
21/7 = 21 × 3/7 × 3 = 63/21 - Subtract the two like fractions:
392/21 - 63/21 = 392 - 63/21 = 329/21 - After reducing the fraction, the answer is 47/3
- In mixed form: 152/3
MathStep (Works offline)
Download our mobile app and learn to work with fractions in your own time:
Android and iPhone/ iPad
Related: 56/3-42/7 56/6-21/7 56/3-21/14 56/3-63/7 56/9-21/7 56/15-21/7 56/3-21/35 56/21-21/7 56/3-21/49