Subtract 56/21 from 5/45
1st number: 5/45, 2nd number: 2 14/21
5/45 - 56/21 is -23/9.
Steps for subtracting fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 45 and 21 is 315
Next, find the equivalent fraction of both fractional numbers with denominator 315 - For the 1st fraction, since 45 × 7 = 315,
5/45 = 5 × 7/45 × 7 = 35/315 - Likewise, for the 2nd fraction, since 21 × 15 = 315,
56/21 = 56 × 15/21 × 15 = 840/315 - Subtract the two like fractions:
35/315 - 840/315 = 35 - 840/315 = -805/315 - After reducing the fraction, the answer is -23/9
MathStep (Works offline)
Download our mobile app and learn to work with fractions in your own time:
Android and iPhone/ iPad
Related: 10/45-56/21 5/90-56/21 5/45-56/42 15/45-56/21 5/45-56/63 25/45-56/21 35/45-56/21