Add 5/12 and 21/18
1st number: 5/12, 2nd number: 1 3/18
5/12 + 21/18 is 19/12.
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,
5/12 = 5 × 3/12 × 3 = 15/36 - Likewise, for the 2nd fraction, since 18 × 2 = 36,
21/18 = 21 × 2/18 × 2 = 42/36 - Add the two like fractions:
15/36 + 42/36 = 15 + 42/36 = 57/36 - 57/36 simplified gives 19/12
- So, 5/12 + 21/18 = 19/12
In mixed form: 17/12
MathStep (Works offline)
Download our mobile app and learn to work with fractions in your own time:
Android and iPhone/ iPad
Related: 10/12+21/18 5/12+42/18 5/24+21/18 5/12+21/36 15/12+21/18 5/12+63/18 5/36+21/18 5/12+21/54 25/12+21/18 5/60+21/18 5/12+21/90 35/12+21/18 5/84+21/18