Add 1/2 and 21/9
1st number: 1/2, 2nd number: 2 3/9
1/2 + 21/9 is 17/6.
Steps for adding fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 2 and 9 is 18
Next, find the equivalent fraction of both fractional numbers with denominator 18 - For the 1st fraction, since 2 × 9 = 18,
1/2 = 1 × 9/2 × 9 = 9/18 - Likewise, for the 2nd fraction, since 9 × 2 = 18,
21/9 = 21 × 2/9 × 2 = 42/18 - Add the two like fractions:
9/18 + 42/18 = 9 + 42/18 = 51/18 - 51/18 simplified gives 17/6
- So, 1/2 + 21/9 = 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: 1/2+42/9 1/4+21/9 1/2+21/18 3/2+21/9 1/2+63/9 1/6+21/9 1/2+21/27 5/2+21/9 1/10+21/9 1/2+21/45 7/2+21/9 1/14+21/9 1/2+21/63