Subtract 3/45 from 56/21
1st number: 2 14/21, 2nd number: 3/45
56/21 - 3/45 is 13/5.
Steps for subtracting fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 21 and 45 is 315
Next, find the equivalent fraction of both fractional numbers with denominator 315 - For the 1st fraction, since 21 × 15 = 315,
56/21 = 56 × 15/21 × 15 = 840/315 - Likewise, for the 2nd fraction, since 45 × 7 = 315,
3/45 = 3 × 7/45 × 7 = 21/315 - Subtract the two like fractions:
840/315 - 21/315 = 840 - 21/315 = 819/315 - After reducing the fraction, the answer is 13/5
- In mixed form: 23/5
MathStep (Works offline)
Download our mobile app and learn to work with fractions in your own time:
Android and iPhone/ iPad
Related: 56/21-6/45 56/42-3/45 56/21-3/90 56/21-9/45 56/63-3/45 56/21-15/45 56/21-21/45