Add 21/9 and 56/7
1st number: 2 3/9, 2nd number: 8 0/7
21/9 + 56/7 is 31/3.
Steps for adding fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 9 and 7 is 63
Next, find the equivalent fraction of both fractional numbers with denominator 63 - For the 1st fraction, since 9 × 7 = 63,
21/9 = 21 × 7/9 × 7 = 147/63 - Likewise, for the 2nd fraction, since 7 × 9 = 63,
56/7 = 56 × 9/7 × 9 = 504/63 - Add the two like fractions:
147/63 + 504/63 = 147 + 504/63 = 651/63 - 651/63 simplified gives 31/3
- So, 21/9 + 56/7 = 31/3
In mixed form: 101/3
MathStep (Works offline)
Download our mobile app and learn to work with fractions in your own time:
Android and iPhone/ iPad
Related: 42/9+56/7 21/18+56/7 21/9+56/14 63/9+56/7 21/27+56/7 21/9+56/21 21/45+56/7 21/9+56/35 21/63+56/7 21/9+56/49