Add 21/9 and 28/24
1st number: 2 3/9, 2nd number: 1 4/24
21/9 + 28/24 is 7/2.
Steps for adding fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 9 and 24 is 72
Next, find the equivalent fraction of both fractional numbers with denominator 72 - For the 1st fraction, since 9 × 8 = 72,
21/9 = 21 × 8/9 × 8 = 168/72 - Likewise, for the 2nd fraction, since 24 × 3 = 72,
28/24 = 28 × 3/24 × 3 = 84/72 - Add the two like fractions:
168/72 + 84/72 = 168 + 84/72 = 252/72 - 252/72 simplified gives 7/2
- So, 21/9 + 28/24 = 7/2
In mixed form: 31/2
MathStep (Works offline)
Download our mobile app and learn to work with fractions in your own time:
Android and iPhone/ iPad
Related: 42/9+28/24 21/9+56/24 21/18+28/24 21/9+28/48 63/9+28/24 21/9+84/24 21/27+28/24 21/9+28/72 21/45+28/24 21/63+28/24