Add 30/15 and 18/8
1st number: 2 0/15, 2nd number: 2 2/8
30/15 + 18/8 is 17/4.
Steps for adding fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 15 and 8 is 120
Next, find the equivalent fraction of both fractional numbers with denominator 120 - For the 1st fraction, since 15 × 8 = 120,
30/15 = 30 × 8/15 × 8 = 240/120 - Likewise, for the 2nd fraction, since 8 × 15 = 120,
18/8 = 18 × 15/8 × 15 = 270/120 - Add the two like fractions:
240/120 + 270/120 = 240 + 270/120 = 510/120 - 510/120 simplified gives 17/4
- So, 30/15 + 18/8 = 17/4
In mixed form: 41/4
MathStep (Works offline)
Download our mobile app and learn to work with fractions in your own time:
Android and iPhone/ iPad
Related: 60/15+18/8 30/15+36/8 30/15+18/16 90/15+18/8 30/15+54/8 30/45+18/8 30/15+18/24 30/15+90/8 30/75+18/8 30/15+18/40 30/15+18/56