Fractions must share a common denominator in order to be added or subtracted. The common denominator is the least common multiple of all the denominators.
What is \( \frac{2}{3} \) + \( \frac{9}{9} \)?
| 1\(\frac{2}{3}\) | |
| \( \frac{4}{9} \) | |
| 1 \( \frac{6}{12} \) | |
| \( \frac{7}{9} \) |