Add 5/15 and 7/18
5/15 + 7/18 is 13/18.
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,
5/15 = 5 × 6/15 × 6 = 30/90 - Likewise, for the 2nd fraction, since 18 × 5 = 90,
7/18 = 7 × 5/18 × 5 = 35/90 - Add the two like fractions:
30/90 + 35/90 = 30 + 35/90 = 65/90 - 65/90 simplified gives 13/18
- So, 5/15 + 7/18 = 13/18
MathStep (Works offline)
Download our mobile app and learn to work with fractions in your own time:
Android and iPhone/ iPad
Related: 10/15+7/18 5/15+14/18 5/30+7/18 5/15+7/36 5/15+21/18 5/45+7/18 5/15+7/54 25/15+7/18 5/15+35/18 5/75+7/18 5/15+7/90 35/15+7/18 5/15+49/18