Add 18/15 and 27/40
1st number: 1 3/15, 2nd number: 27/40
18/15 + 27/40 is 15/8.
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,
27/40 = 27 × 3/40 × 3 = 81/120 - Add the two like fractions:
144/120 + 81/120 = 144 + 81/120 = 225/120 - 225/120 simplified gives 15/8
- So, 18/15 + 27/40 = 15/8
In mixed form: 17/8
MathStep (Works offline)
Download our mobile app and learn to work with fractions in your own time:
Android and iPhone/ iPad
Related: 36/15+27/40 18/15+54/40 18/30+27/40 18/15+27/80 54/15+27/40 18/15+81/40 18/45+27/40 90/15+27/40 18/75+27/40