Add 21/9 and 18/36
1st number: 2 3/9, 2nd number: 18/36
21/9 + 18/36 is 17/6.
Steps for adding fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 9 and 36 is 36
Next, find the equivalent fraction of both fractional numbers with denominator 36 - For the 1st fraction, since 9 × 4 = 36,
21/9 = 21 × 4/9 × 4 = 84/36 - Likewise, for the 2nd fraction, since 36 × 1 = 36,
18/36 = 18 × 1/36 × 1 = 18/36 - Add the two like fractions:
84/36 + 18/36 = 84 + 18/36 = 102/36 - 102/36 simplified gives 17/6
- So, 21/9 + 18/36 = 17/6
In mixed form: 25/6
MathStep (Works offline)
Download our mobile app and learn to work with fractions in your own time:
Android and iPhone/ iPad
Related: 42/9+18/36 21/18+18/36 21/9+18/72 63/9+18/36 21/9+54/36 21/27+18/36 21/9+90/36 21/45+18/36 21/63+18/36