Add 28/12 and 9/7
1st number: 2 4/12, 2nd number: 1 2/7
28/12 + 9/7 is 76/21.
Steps for adding fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 12 and 7 is 84
Next, find the equivalent fraction of both fractional numbers with denominator 84 - For the 1st fraction, since 12 × 7 = 84,
28/12 = 28 × 7/12 × 7 = 196/84 - Likewise, for the 2nd fraction, since 7 × 12 = 84,
9/7 = 9 × 12/7 × 12 = 108/84 - Add the two like fractions:
196/84 + 108/84 = 196 + 108/84 = 304/84 - 304/84 simplified gives 76/21
- So, 28/12 + 9/7 = 76/21
In mixed form: 313/21
MathStep (Works offline)
Download our mobile app and learn to work with fractions in your own time:
Android and iPhone/ iPad
Related: 56/12+9/7 28/12+18/7 28/24+9/7 28/12+9/14 84/12+9/7 28/12+27/7 28/36+9/7 28/12+9/21 28/12+45/7 28/60+9/7 28/12+9/35 28/12+63/7 28/84+9/7 28/12+9/49