Add 84/9 and 21/8
1st number: 9 3/9, 2nd number: 2 5/8
84/9 + 21/8 is 287/24.
Steps for adding fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 9 and 8 is 72
Next, find the equivalent fraction of both fractional numbers with denominator 72 - For the 1st fraction, since 9 × 8 = 72,
84/9 = 84 × 8/9 × 8 = 672/72 - Likewise, for the 2nd fraction, since 8 × 9 = 72,
21/8 = 21 × 9/8 × 9 = 189/72 - Add the two like fractions:
672/72 + 189/72 = 672 + 189/72 = 861/72 - 861/72 simplified gives 287/24
- So, 84/9 + 21/8 = 287/24
In mixed form: 1123/24
MathStep (Works offline)
Download our mobile app and learn to work with fractions in your own time:
Android and iPhone/ iPad
Related: 84/9+42/8 84/18+21/8 84/9+21/16 84/9+63/8 84/27+21/8 84/9+21/24 84/45+21/8 84/9+21/40 84/63+21/8 84/9+21/56