Subtract 56/21 from 15/4
1st number: 3 3/4, 2nd number: 2 14/21
15/4 - 56/21 is 13/12.
Steps for subtracting fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 4 and 21 is 84
Next, find the equivalent fraction of both fractional numbers with denominator 84 - For the 1st fraction, since 4 × 21 = 84,
15/4 = 15 × 21/4 × 21 = 315/84 - Likewise, for the 2nd fraction, since 21 × 4 = 84,
56/21 = 56 × 4/21 × 4 = 224/84 - Subtract the two like fractions:
315/84 - 224/84 = 315 - 224/84 = 91/84 - After reducing the fraction, the answer is 13/12
- In mixed form: 11/12
MathStep (Works offline)
Download our mobile app and learn to work with fractions in your own time:
Android and iPhone/ iPad
Related: 30/4-56/21 15/8-56/21 15/4-56/42 45/4-56/21 15/12-56/21 15/4-56/63 75/4-56/21 15/20-56/21 15/28-56/21