Add 10/12 and 21/9
1st number: 10/12, 2nd number: 2 3/9
10/12 + 21/9 is 19/6.
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,
10/12 = 10 × 3/12 × 3 = 30/36 - Likewise, for the 2nd fraction, since 9 × 4 = 36,
21/9 = 21 × 4/9 × 4 = 84/36 - Add the two like fractions:
30/36 + 84/36 = 30 + 84/36 = 114/36 - 114/36 simplified gives 19/6
- So, 10/12 + 21/9 = 19/6
In mixed form: 31/6
MathStep (Works offline)
Download our mobile app and learn to work with fractions in your own time:
Android and iPhone/ iPad
Related: 20/12+21/9 10/12+42/9 10/24+21/9 10/12+21/18 30/12+21/9 10/12+63/9 10/36+21/9 10/12+21/27 50/12+21/9 10/60+21/9 10/12+21/45 70/12+21/9 10/84+21/9 10/12+21/63