Subtract 15/8 from 56/21
1st number: 2 14/21, 2nd number: 1 7/8
56/21 - 15/8 is 19/24.
Steps for subtracting fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 21 and 8 is 168
Next, find the equivalent fraction of both fractional numbers with denominator 168 - For the 1st fraction, since 21 × 8 = 168,
56/21 = 56 × 8/21 × 8 = 448/168 - Likewise, for the 2nd fraction, since 8 × 21 = 168,
15/8 = 15 × 21/8 × 21 = 315/168 - Subtract the two like fractions:
448/168 - 315/168 = 448 - 315/168 = 133/168 - After reducing the fraction, the answer is 19/24
MathStep (Works offline)
Download our mobile app and learn to work with fractions in your own time:
Android and iPhone/ iPad
Related: 56/21-30/8 56/42-15/8 56/21-15/16 56/21-45/8 56/63-15/8 56/21-15/24 56/21-75/8 56/21-15/40 56/21-15/56