Add 7/12 and 21/9
1st number: 7/12, 2nd number: 2 3/9
7/12 + 21/9 is 35/12.
Steps for adding fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 12 and 9 is 36
Next, find the equivalent fraction of both fractional numbers with denominator 36 - For the 1st fraction, since 12 × 3 = 36,
7/12 = 7 × 3/12 × 3 = 21/36 - Likewise, for the 2nd fraction, since 9 × 4 = 36,
21/9 = 21 × 4/9 × 4 = 84/36 - Add the two like fractions:
21/36 + 84/36 = 21 + 84/36 = 105/36 - 105/36 simplified gives 35/12
- So, 7/12 + 21/9 = 35/12
In mixed form: 211/12
MathStep (Works offline)
Download our mobile app and learn to work with fractions in your own time:
Android and iPhone/ iPad
Related: 14/12+21/9 7/12+42/9 7/24+21/9 7/12+21/18 21/12+21/9 7/12+63/9 7/36+21/9 7/12+21/27 35/12+21/9 7/60+21/9 7/12+21/45 49/12+21/9 7/84+21/9 7/12+21/63