Add 9/18 and 12/9
1st number: 9/18, 2nd number: 1 3/9
9/18 + 12/9 is 11/6.
Steps for adding fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 18 and 9 is 18
Next, find the equivalent fraction of both fractional numbers with denominator 18 - For the 1st fraction, since 18 × 1 = 18,
9/18 = 9 × 1/18 × 1 = 9/18 - Likewise, for the 2nd fraction, since 9 × 2 = 18,
12/9 = 12 × 2/9 × 2 = 24/18 - Add the two like fractions:
9/18 + 24/18 = 9 + 24/18 = 33/18 - 33/18 simplified gives 11/6
- So, 9/18 + 12/9 = 11/6
In mixed form: 15/6
MathStep (Works offline)
Download our mobile app and learn to work with fractions in your own time:
Android and iPhone/ iPad
Related: 9/18+24/9 9/36+12/9 9/18+12/18 27/18+12/9 9/18+36/9 9/54+12/9 9/18+12/27 45/18+12/9 9/18+60/9 9/90+12/9 9/18+12/45 63/18+12/9 9/18+84/9 9/18+12/63