Add 6/9 and 2/21
6/9 + 2/21 is 16/21.
Steps for adding 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,
6/9 = 6 × 7/9 × 7 = 42/63 - Likewise, for the 2nd fraction, since 21 × 3 = 63,
2/21 = 2 × 3/21 × 3 = 6/63 - Add the two like fractions:
42/63 + 6/63 = 42 + 6/63 = 48/63 - 48/63 simplified gives 16/21
- So, 6/9 + 2/21 = 16/21
MathStep (Works offline)
Download our mobile app and learn to work with fractions in your own time:
Android and iPhone/ iPad
Related: 12/9+2/21 6/9+4/21 6/18+2/21 6/9+2/42 18/9+2/21 6/9+6/21 6/27+2/21 6/9+2/63 30/9+2/21 6/9+10/21 6/45+2/21 42/9+2/21 6/9+14/21 6/63+2/21