Add 18/3 and 21/36
1st number: 6 0/3, 2nd number: 21/36
18/3 + 21/36 is 79/12.
Steps for adding fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 3 and 36 is 36
Next, find the equivalent fraction of both fractional numbers with denominator 36 - For the 1st fraction, since 3 × 12 = 36,
18/3 = 18 × 12/3 × 12 = 216/36 - Likewise, for the 2nd fraction, since 36 × 1 = 36,
21/36 = 21 × 1/36 × 1 = 21/36 - Add the two like fractions:
216/36 + 21/36 = 216 + 21/36 = 237/36 - 237/36 simplified gives 79/12
- So, 18/3 + 21/36 = 79/12
In mixed form: 67/12
MathStep (Works offline)
Download our mobile app and learn to work with fractions in your own time:
Android and iPhone/ iPad
Related: 36/3+21/36 18/3+42/36 18/6+21/36 18/3+21/72 54/3+21/36 18/3+63/36 18/9+21/36 90/3+21/36 18/15+21/36 18/21+21/36