Add 9/12 and 21/6
1st number: 9/12, 2nd number: 3 3/6
9/12 + 21/6 is 17/4.
Steps for adding fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 12 and 6 is 12
Next, find the equivalent fraction of both fractional numbers with denominator 12 - For the 1st fraction, since 12 × 1 = 12,
9/12 = 9 × 1/12 × 1 = 9/12 - Likewise, for the 2nd fraction, since 6 × 2 = 12,
21/6 = 21 × 2/6 × 2 = 42/12 - Add the two like fractions:
9/12 + 42/12 = 9 + 42/12 = 51/12 - 51/12 simplified gives 17/4
- So, 9/12 + 21/6 = 17/4
In mixed form: 41/4
MathStep (Works offline)
Download our mobile app and learn to work with fractions in your own time:
Android and iPhone/ iPad
Related: 18/12+21/6 9/12+42/6 9/24+21/6 9/12+21/12 27/12+21/6 9/12+63/6 9/36+21/6 9/12+21/18 45/12+21/6 9/60+21/6 9/12+21/30 63/12+21/6 9/84+21/6 9/12+21/42