Subtract 21/7 from 49/9
1st number: 5 4/9, 2nd number: 3 0/7
49/9 - 21/7 is 22/9.
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,
49/9 = 49 × 7/9 × 7 = 343/63 - Likewise, for the 2nd fraction, since 7 × 9 = 63,
21/7 = 21 × 9/7 × 9 = 189/63 - Subtract the two like fractions:
343/63 - 189/63 = 343 - 189/63 = 154/63 - After reducing the fraction, the answer is 22/9
- In mixed form: 24/9
MathStep (Works offline)
Download our mobile app and learn to work with fractions in your own time:
Android and iPhone/ iPad
Related: 98/9-21/7 49/9-42/7 49/18-21/7 49/9-21/14 49/9-63/7 49/27-21/7 49/45-21/7 49/9-21/35 49/63-21/7 49/9-21/49