Add 27/12 and 21/18
1st number: 2 3/12, 2nd number: 1 3/18
27/12 + 21/18 is 41/12.
Steps for adding fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 12 and 18 is 36
Next, find the equivalent fraction of both fractional numbers with denominator 36 - For the 1st fraction, since 12 × 3 = 36,
27/12 = 27 × 3/12 × 3 = 81/36 - Likewise, for the 2nd fraction, since 18 × 2 = 36,
21/18 = 21 × 2/18 × 2 = 42/36 - Add the two like fractions:
81/36 + 42/36 = 81 + 42/36 = 123/36 - 123/36 simplified gives 41/12
- So, 27/12 + 21/18 = 41/12
In mixed form: 35/12
MathStep (Works offline)
Download our mobile app and learn to work with fractions in your own time:
Android and iPhone/ iPad
Related: 54/12+21/18 27/12+42/18 27/24+21/18 27/12+21/36 81/12+21/18 27/12+63/18 27/36+21/18 27/12+21/54 27/60+21/18 27/12+21/90 27/84+21/18