Add 18/15 and 30/9
1st number: 1 3/15, 2nd number: 3 3/9
18/15 + 30/9 is 68/15.
Steps for adding fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 15 and 9 is 45
Next, find the equivalent fraction of both fractional numbers with denominator 45 - For the 1st fraction, since 15 × 3 = 45,
18/15 = 18 × 3/15 × 3 = 54/45 - Likewise, for the 2nd fraction, since 9 × 5 = 45,
30/9 = 30 × 5/9 × 5 = 150/45 - Add the two like fractions:
54/45 + 150/45 = 54 + 150/45 = 204/45 - 204/45 simplified gives 68/15
- So, 18/15 + 30/9 = 68/15
In mixed form: 48/15
MathStep (Works offline)
Download our mobile app and learn to work with fractions in your own time:
Android and iPhone/ iPad
Related: 36/15+30/9 18/15+60/9 18/30+30/9 18/15+30/18 54/15+30/9 18/15+90/9 18/45+30/9 18/15+30/27 90/15+30/9 18/75+30/9 18/15+30/45 18/15+30/63