Add 21/9 and 4/18
1st number: 2 3/9, 2nd number: 4/18
21/9 + 4/18 is 23/9.
Steps for adding fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 9 and 18 is 18
Next, find the equivalent fraction of both fractional numbers with denominator 18 - For the 1st fraction, since 9 × 2 = 18,
21/9 = 21 × 2/9 × 2 = 42/18 - Likewise, for the 2nd fraction, since 18 × 1 = 18,
4/18 = 4 × 1/18 × 1 = 4/18 - Add the two like fractions:
42/18 + 4/18 = 42 + 4/18 = 46/18 - 46/18 simplified gives 23/9
- So, 21/9 + 4/18 = 23/9
In mixed form: 25/9
MathStep (Works offline)
Download our mobile app and learn to work with fractions in your own time:
Android and iPhone/ iPad
Related: 42/9+4/18 21/9+8/18 21/18+4/18 21/9+4/36 63/9+4/18 21/9+12/18 21/27+4/18 21/9+4/54 21/9+20/18 21/45+4/18 21/9+4/90 21/9+28/18 21/63+4/18