Add 7/9 and 21/56
7/9 + 21/56 is 83/72.
Steps for adding fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 9 and 56 is 504
Next, find the equivalent fraction of both fractional numbers with denominator 504 - For the 1st fraction, since 9 × 56 = 504,
7/9 = 7 × 56/9 × 56 = 392/504 - Likewise, for the 2nd fraction, since 56 × 9 = 504,
21/56 = 21 × 9/56 × 9 = 189/504 - Add the two like fractions:
392/504 + 189/504 = 392 + 189/504 = 581/504 - 581/504 simplified gives 83/72
- So, 7/9 + 21/56 = 83/72
In mixed form: 111/72
MathStep (Works offline)
Download our mobile app and learn to work with fractions in your own time:
Android and iPhone/ iPad
Related: 14/9+21/56 7/9+42/56 7/18+21/56 21/9+21/56 7/9+63/56 7/27+21/56 35/9+21/56 7/45+21/56 49/9+21/56 7/63+21/56