Add 28/12 and 18/9
1st number: 2 4/12, 2nd number: 2 0/9
28/12 + 18/9 is 13/3.
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,
28/12 = 28 × 3/12 × 3 = 84/36 - Likewise, for the 2nd fraction, since 9 × 4 = 36,
18/9 = 18 × 4/9 × 4 = 72/36 - Add the two like fractions:
84/36 + 72/36 = 84 + 72/36 = 156/36 - 156/36 simplified gives 13/3
- So, 28/12 + 18/9 = 13/3
In mixed form: 41/3
MathStep (Works offline)
Download our mobile app and learn to work with fractions in your own time:
Android and iPhone/ iPad
Related: 56/12+18/9 28/12+36/9 28/24+18/9 84/12+18/9 28/12+54/9 28/36+18/9 28/12+18/27 28/12+90/9 28/60+18/9 28/12+18/45 28/84+18/9 28/12+18/63