Add 18/15 and 7/40
1st number: 1 3/15, 2nd number: 7/40
18/15 + 7/40 is 11/8.
Steps for adding fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 15 and 40 is 120
Next, find the equivalent fraction of both fractional numbers with denominator 120 - For the 1st fraction, since 15 × 8 = 120,
18/15 = 18 × 8/15 × 8 = 144/120 - Likewise, for the 2nd fraction, since 40 × 3 = 120,
7/40 = 7 × 3/40 × 3 = 21/120 - Add the two like fractions:
144/120 + 21/120 = 144 + 21/120 = 165/120 - 165/120 simplified gives 11/8
- So, 18/15 + 7/40 = 11/8
In mixed form: 13/8
MathStep (Works offline)
Download our mobile app and learn to work with fractions in your own time:
Android and iPhone/ iPad
Related: 36/15+7/40 18/15+14/40 18/30+7/40 18/15+7/80 54/15+7/40 18/15+21/40 18/45+7/40 90/15+7/40 18/15+35/40 18/75+7/40 18/15+49/40