Add 9/21 and 21/6
1st number: 9/21, 2nd number: 3 3/6
9/21 + 21/6 is 55/14.
Steps for adding fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 21 and 6 is 42
Next, find the equivalent fraction of both fractional numbers with denominator 42 - For the 1st fraction, since 21 × 2 = 42,
9/21 = 9 × 2/21 × 2 = 18/42 - Likewise, for the 2nd fraction, since 6 × 7 = 42,
21/6 = 21 × 7/6 × 7 = 147/42 - Add the two like fractions:
18/42 + 147/42 = 18 + 147/42 = 165/42 - 165/42 simplified gives 55/14
- So, 9/21 + 21/6 = 55/14
In mixed form: 313/14
MathStep (Works offline)
Download our mobile app and learn to work with fractions in your own time:
Android and iPhone/ iPad
Related: 18/21+21/6 9/21+42/6 9/42+21/6 9/21+21/12 27/21+21/6 9/21+63/6 9/63+21/6 9/21+21/18 45/21+21/6 9/21+21/30 63/21+21/6 9/21+21/42