Subtract 6/21 from 2/9
2/9 - 6/21 is -4/63.
Steps for subtracting fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 9 and 21 is 63
Next, find the equivalent fraction of both fractional numbers with denominator 63 - For the 1st fraction, since 9 × 7 = 63,
2/9 = 2 × 7/9 × 7 = 14/63 - Likewise, for the 2nd fraction, since 21 × 3 = 63,
6/21 = 6 × 3/21 × 3 = 18/63 - Subtract the two like fractions:
14/63 - 18/63 = 14 - 18/63 = -4/63
MathStep (Works offline)
Download our mobile app and learn to work with fractions in your own time:
Android and iPhone/ iPad
Related: 4/9-6/21 2/9-12/21 2/18-6/21 2/9-6/42 6/9-6/21 2/9-18/21 2/27-6/21 2/9-6/63 10/9-6/21 2/9-30/21 2/45-6/21 14/9-6/21 2/9-42/21 2/63-6/21