Subtract 21/45 from 56/3
1st number: 18 2/3, 2nd number: 21/45
56/3 - 21/45 is 91/5.
Steps for subtracting fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 3 and 45 is 45
Next, find the equivalent fraction of both fractional numbers with denominator 45 - For the 1st fraction, since 3 × 15 = 45,
56/3 = 56 × 15/3 × 15 = 840/45 - Likewise, for the 2nd fraction, since 45 × 1 = 45,
21/45 = 21 × 1/45 × 1 = 21/45 - Subtract the two like fractions:
840/45 - 21/45 = 840 - 21/45 = 819/45 - After reducing the fraction, the answer is 91/5
- In mixed form: 181/5
MathStep (Works offline)
Download our mobile app and learn to work with fractions in your own time:
Android and iPhone/ iPad
Related: 56/3-42/45 56/6-21/45 56/3-21/90 56/3-63/45 56/9-21/45 56/15-21/45 56/21-21/45