Subtract 15/7 from 56/3
1st number: 18 2/3, 2nd number: 2 1/7
56/3 - 15/7 is 347/21.
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,
15/7 = 15 × 3/7 × 3 = 45/21 - Subtract the two like fractions:
392/21 - 45/21 = 392 - 45/21 = 347/21 - In mixed form: 1611/21
MathStep (Works offline)
Download our mobile app and learn to work with fractions in your own time:
Android and iPhone/ iPad
Related: 56/3-30/7 56/6-15/7 56/3-15/14 56/3-45/7 56/9-15/7 56/3-15/21 56/3-75/7 56/15-15/7 56/3-15/35 56/21-15/7 56/3-15/49