Add 18/9 and 81/12
1st number: 2 0/9, 2nd number: 6 9/12
18/9 + 81/12 is 35/4.
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,
18/9 = 18 × 4/9 × 4 = 72/36 - Likewise, for the 2nd fraction, since 12 × 3 = 36,
81/12 = 81 × 3/12 × 3 = 243/36 - Add the two like fractions:
72/36 + 243/36 = 72 + 243/36 = 315/36 - 315/36 simplified gives 35/4
- So, 18/9 + 81/12 = 35/4
In mixed form: 83/4
MathStep (Works offline)
Download our mobile app and learn to work with fractions in your own time:
Android and iPhone/ iPad
Related: 36/9+81/12 18/9+81/24 54/9+81/12 18/27+81/12 18/9+81/36 90/9+81/12 18/45+81/12 18/9+81/60 18/63+81/12 18/9+81/84