Add 21/8 and 6/9
1st number: 2 5/8, 2nd number: 6/9
21/8 + 6/9 is 79/24.
Steps for adding fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 8 and 9 is 72
Next, find the equivalent fraction of both fractional numbers with denominator 72 - For the 1st fraction, since 8 × 9 = 72,
21/8 = 21 × 9/8 × 9 = 189/72 - Likewise, for the 2nd fraction, since 9 × 8 = 72,
6/9 = 6 × 8/9 × 8 = 48/72 - Add the two like fractions:
189/72 + 48/72 = 189 + 48/72 = 237/72 - 237/72 simplified gives 79/24
- So, 21/8 + 6/9 = 79/24
In mixed form: 37/24
MathStep (Works offline)
Download our mobile app and learn to work with fractions in your own time:
Android and iPhone/ iPad
Related: 42/8+6/9 21/8+12/9 21/16+6/9 21/8+6/18 63/8+6/9 21/8+18/9 21/24+6/9 21/8+6/27 21/8+30/9 21/40+6/9 21/8+6/45 21/8+42/9 21/56+6/9 21/8+6/63