Subtract 15/5 from 56/21
1st number: 2 14/21, 2nd number: 3 0/5
56/21 - 15/5 is -1/3.
Steps for subtracting fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 21 and 5 is 105
Next, find the equivalent fraction of both fractional numbers with denominator 105 - For the 1st fraction, since 21 × 5 = 105,
56/21 = 56 × 5/21 × 5 = 280/105 - Likewise, for the 2nd fraction, since 5 × 21 = 105,
15/5 = 15 × 21/5 × 21 = 315/105 - Subtract the two like fractions:
280/105 - 315/105 = 280 - 315/105 = -35/105 - After reducing the fraction, the answer is -1/3
MathStep (Works offline)
Download our mobile app and learn to work with fractions in your own time:
Android and iPhone/ iPad
Related: 56/21-30/5 56/42-15/5 56/21-15/10 56/21-45/5 56/63-15/5 56/21-75/5 56/21-15/25 56/21-15/35