Add 12/2 and 21/9
1st number: 6 0/2, 2nd number: 2 3/9
12/2 + 21/9 is 25/3.
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,
12/2 = 12 × 9/2 × 9 = 108/18 - Likewise, for the 2nd fraction, since 9 × 2 = 18,
21/9 = 21 × 2/9 × 2 = 42/18 - Add the two like fractions:
108/18 + 42/18 = 108 + 42/18 = 150/18 - 150/18 simplified gives 25/3
- So, 12/2 + 21/9 = 25/3
In mixed form: 81/3
MathStep (Works offline)
Download our mobile app and learn to work with fractions in your own time:
Android and iPhone/ iPad
Related: 24/2+21/9 12/2+42/9 12/4+21/9 12/2+21/18 36/2+21/9 12/2+63/9 12/6+21/9 12/2+21/27 60/2+21/9 12/10+21/9 12/2+21/45 84/2+21/9 12/14+21/9 12/2+21/63