Add 9/21 and 21/24
9/21 + 21/24 is 73/56.
Steps for adding fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 21 and 24 is 168
Next, find the equivalent fraction of both fractional numbers with denominator 168 - For the 1st fraction, since 21 × 8 = 168,
9/21 = 9 × 8/21 × 8 = 72/168 - Likewise, for the 2nd fraction, since 24 × 7 = 168,
21/24 = 21 × 7/24 × 7 = 147/168 - Add the two like fractions:
72/168 + 147/168 = 72 + 147/168 = 219/168 - 219/168 simplified gives 73/56
- So, 9/21 + 21/24 = 73/56
In mixed form: 117/56
MathStep (Works offline)
Download our mobile app and learn to work with fractions in your own time:
Android and iPhone/ iPad
Related: 18/21+21/24 9/21+42/24 9/42+21/24 9/21+21/48 27/21+21/24 9/21+63/24 9/63+21/24 9/21+21/72 45/21+21/24 63/21+21/24