Add 81/12 and 15/9
1st number: 6 9/12, 2nd number: 1 6/9
81/12 + 15/9 is 101/12.
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,
81/12 = 81 × 3/12 × 3 = 243/36 - Likewise, for the 2nd fraction, since 9 × 4 = 36,
15/9 = 15 × 4/9 × 4 = 60/36 - Add the two like fractions:
243/36 + 60/36 = 243 + 60/36 = 303/36 - 303/36 simplified gives 101/12
- So, 81/12 + 15/9 = 101/12
In mixed form: 85/12
MathStep (Works offline)
Download our mobile app and learn to work with fractions in your own time:
Android and iPhone/ iPad
Related: 81/12+30/9 81/24+15/9 81/12+15/18 81/12+45/9 81/36+15/9 81/12+15/27 81/12+75/9 81/60+15/9 81/12+15/45 81/84+15/9 81/12+15/63