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 \( \frac{9}{9} \) + \( \frac{9}{15} \)?
| 2 \( \frac{1}{7} \) | |
| 1 \( \frac{7}{13} \) | |
| \( \frac{6}{11} \) | |
| 1\(\frac{3}{5}\) |