Add 9/15 and 12/18
9/15 + 12/18 is 19/15.
Steps for adding fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 15 and 18 is 90
Next, find the equivalent fraction of both fractional numbers with denominator 90 - For the 1st fraction, since 15 × 6 = 90,
9/15 = 9 × 6/15 × 6 = 54/90 - Likewise, for the 2nd fraction, since 18 × 5 = 90,
12/18 = 12 × 5/18 × 5 = 60/90 - Add the two like fractions:
54/90 + 60/90 = 54 + 60/90 = 114/90 - 114/90 simplified gives 19/15
- So, 9/15 + 12/18 = 19/15
In mixed form: 14/15
MathStep (Works offline)
Download our mobile app and learn to work with fractions in your own time:
Android and iPhone/ iPad
Related: 18/15+12/18 9/15+24/18 9/30+12/18 9/15+12/36 27/15+12/18 9/15+36/18 9/45+12/18 9/15+12/54 45/15+12/18 9/15+60/18 9/75+12/18 9/15+12/90 63/15+12/18 9/15+84/18