Add 9/15 and 18/30
9/15 + 18/30 is 6/5.
Steps for adding fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 15 and 30 is 30
Next, find the equivalent fraction of both fractional numbers with denominator 30 - For the 1st fraction, since 15 × 2 = 30,
9/15 = 9 × 2/15 × 2 = 18/30 - Likewise, for the 2nd fraction, since 30 × 1 = 30,
18/30 = 18 × 1/30 × 1 = 18/30 - Add the two like fractions:
18/30 + 18/30 = 18 + 18/30 = 36/30 - 36/30 simplified gives 6/5
- So, 9/15 + 18/30 = 6/5
In mixed form: 11/5
MathStep (Works offline)
Download our mobile app and learn to work with fractions in your own time:
Android and iPhone/ iPad
Related: 18/15+18/30 9/15+36/30 9/30+18/30 9/15+18/60 27/15+18/30 9/15+54/30 9/45+18/30 9/15+18/90 45/15+18/30 9/15+90/30 9/75+18/30 63/15+18/30