Add 15/12 and 84/9
1st number: 1 3/12, 2nd number: 9 3/9
15/12 + 84/9 is 127/12.
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,
15/12 = 15 × 3/12 × 3 = 45/36 - Likewise, for the 2nd fraction, since 9 × 4 = 36,
84/9 = 84 × 4/9 × 4 = 336/36 - Add the two like fractions:
45/36 + 336/36 = 45 + 336/36 = 381/36 - 381/36 simplified gives 127/12
- So, 15/12 + 84/9 = 127/12
In mixed form: 107/12
MathStep (Works offline)
Download our mobile app and learn to work with fractions in your own time:
Android and iPhone/ iPad
Related: 30/12+84/9 15/24+84/9 15/12+84/18 45/12+84/9 15/36+84/9 15/12+84/27 75/12+84/9 15/60+84/9 15/12+84/45 15/84+84/9 15/12+84/63