Add 21/9 and 56/8
1st number: 2 3/9, 2nd number: 7 0/8
21/9 + 56/8 is 28/3.
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,
21/9 = 21 × 8/9 × 8 = 168/72 - Likewise, for the 2nd fraction, since 8 × 9 = 72,
56/8 = 56 × 9/8 × 9 = 504/72 - Add the two like fractions:
168/72 + 504/72 = 168 + 504/72 = 672/72 - 672/72 simplified gives 28/3
- So, 21/9 + 56/8 = 28/3
In mixed form: 91/3
MathStep (Works offline)
Download our mobile app and learn to work with fractions in your own time:
Android and iPhone/ iPad
Related: 42/9+56/8 21/18+56/8 21/9+56/16 63/9+56/8 21/27+56/8 21/9+56/24 21/45+56/8 21/9+56/40 21/63+56/8