Subtract 21/7 from 56/9
1st number: 6 2/9, 2nd number: 3 0/7
56/9 - 21/7 is 29/9.
Steps for subtracting fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 9 and 7 is 63
Next, find the equivalent fraction of both fractional numbers with denominator 63 - For the 1st fraction, since 9 × 7 = 63,
56/9 = 56 × 7/9 × 7 = 392/63 - Likewise, for the 2nd fraction, since 7 × 9 = 63,
21/7 = 21 × 9/7 × 9 = 189/63 - Subtract the two like fractions:
392/63 - 189/63 = 392 - 189/63 = 203/63 - After reducing the fraction, the answer is 29/9
- In mixed form: 32/9
MathStep (Works offline)
Download our mobile app and learn to work with fractions in your own time:
Android and iPhone/ iPad
Related: 56/9-42/7 56/18-21/7 56/9-21/14 56/9-63/7 56/27-21/7 56/45-21/7 56/9-21/35 56/63-21/7 56/9-21/49