Add 21/9 and 1/12
1st number: 2 3/9, 2nd number: 1/12
21/9 + 1/12 is 29/12.
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,
1/12 = 1 × 3/12 × 3 = 3/36 - Add the two like fractions:
84/36 + 3/36 = 84 + 3/36 = 87/36 - 87/36 simplified gives 29/12
- So, 21/9 + 1/12 = 29/12
In mixed form: 25/12
MathStep (Works offline)
Download our mobile app and learn to work with fractions in your own time:
Android and iPhone/ iPad
Related: 42/9+1/12 21/9+2/12 21/18+1/12 21/9+1/24 63/9+1/12 21/9+3/12 21/27+1/12 21/9+1/36 21/9+5/12 21/45+1/12 21/9+1/60 21/9+7/12 21/63+1/12 21/9+1/84