Add 80/9 and 21/8
1st number: 8 8/9, 2nd number: 2 5/8
80/9 + 21/8 is 829/72.
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,
80/9 = 80 × 8/9 × 8 = 640/72 - Likewise, for the 2nd fraction, since 8 × 9 = 72,
21/8 = 21 × 9/8 × 9 = 189/72 - Add the two like fractions:
640/72 + 189/72 = 640 + 189/72 = 829/72 - So, 80/9 + 21/8 = 829/72
In mixed form: 1137/72
MathStep (Works offline)
Download our mobile app and learn to work with fractions in your own time:
Android and iPhone/ iPad
Related: 80/9+42/8 80/18+21/8 80/9+21/16 80/9+63/8 80/27+21/8 80/9+21/24 80/45+21/8 80/9+21/40 80/63+21/8 80/9+21/56