Add 21/9 and 2/12
1st number: 2 3/9, 2nd number: 2/12
21/9 + 2/12 is 5/2.
Steps for adding fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 9 and 12 is 36
Next, find the equivalent fraction of both fractional numbers with denominator 36 - For the 1st fraction, since 9 × 4 = 36,
21/9 = 21 × 4/9 × 4 = 84/36 - Likewise, for the 2nd fraction, since 12 × 3 = 36,
2/12 = 2 × 3/12 × 3 = 6/36 - Add the two like fractions:
84/36 + 6/36 = 84 + 6/36 = 90/36 - 90/36 simplified gives 5/2
- So, 21/9 + 2/12 = 5/2
In mixed form: 21/2
MathStep (Works offline)
Download our mobile app and learn to work with fractions in your own time:
Android and iPhone/ iPad
Related: 42/9+2/12 21/9+4/12 21/18+2/12 21/9+2/24 63/9+2/12 21/9+6/12 21/27+2/12 21/9+2/36 21/9+10/12 21/45+2/12 21/9+2/60 21/9+14/12 21/63+2/12 21/9+2/84