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 \( \frac{7}{9} \) + \( \frac{5}{15} \)?
| 2 \( \frac{9}{45} \) | |
| 2 \( \frac{1}{8} \) | |
| 1\(\frac{1}{9}\) | |
| 2 \( \frac{5}{11} \) |