Add 15/18 and 18/27
15/18 + 18/27 is 3/2.
Steps for adding fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 18 and 27 is 54
Next, find the equivalent fraction of both fractional numbers with denominator 54 - For the 1st fraction, since 18 × 3 = 54,
15/18 = 15 × 3/18 × 3 = 45/54 - Likewise, for the 2nd fraction, since 27 × 2 = 54,
18/27 = 18 × 2/27 × 2 = 36/54 - Add the two like fractions:
45/54 + 36/54 = 45 + 36/54 = 81/54 - 81/54 simplified gives 3/2
- So, 15/18 + 18/27 = 3/2
In mixed form: 11/2
MathStep (Works offline)
Download our mobile app and learn to work with fractions in your own time:
Android and iPhone/ iPad
Related: 30/18+18/27 15/18+36/27 15/36+18/27 15/18+18/54 45/18+18/27 15/18+54/27 15/54+18/27 15/18+18/81 75/18+18/27 15/18+90/27 15/90+18/27