Subtract 56/9 from 45/21
1st number: 2 3/21, 2nd number: 6 2/9
45/21 - 56/9 is -257/63.
Steps for subtracting fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 21 and 9 is 63
Next, find the equivalent fraction of both fractional numbers with denominator 63 - For the 1st fraction, since 21 × 3 = 63,
45/21 = 45 × 3/21 × 3 = 135/63 - Likewise, for the 2nd fraction, since 9 × 7 = 63,
56/9 = 56 × 7/9 × 7 = 392/63 - Subtract the two like fractions:
135/63 - 392/63 = 135 - 392/63 = -257/63
MathStep (Works offline)
Download our mobile app and learn to work with fractions in your own time:
Android and iPhone/ iPad
Related: 90/21-56/9 45/42-56/9 45/21-56/18 45/63-56/9 45/21-56/27 45/21-56/45 45/21-56/63