Add 3/12 and 15/18
3/12 + 15/18 is 13/12.
Steps for adding fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 12 and 18 is 36
Next, find the equivalent fraction of both fractional numbers with denominator 36 - For the 1st fraction, since 12 × 3 = 36,
3/12 = 3 × 3/12 × 3 = 9/36 - Likewise, for the 2nd fraction, since 18 × 2 = 36,
15/18 = 15 × 2/18 × 2 = 30/36 - Add the two like fractions:
9/36 + 30/36 = 9 + 30/36 = 39/36 - 39/36 simplified gives 13/12
- So, 3/12 + 15/18 = 13/12
In mixed form: 11/12
MathStep (Works offline)
Download our mobile app and learn to work with fractions in your own time:
Android and iPhone/ iPad
Related: 6/12+15/18 3/12+30/18 3/24+15/18 3/12+15/36 9/12+15/18 3/12+45/18 3/36+15/18 3/12+15/54 15/12+15/18 3/12+75/18 3/60+15/18 3/12+15/90 21/12+15/18 3/84+15/18