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 \( \frac{5}{5} \) + \( \frac{4}{9} \)?
| 1\(\frac{4}{9}\) | |
| \( \frac{7}{16} \) | |
| 2 \( \frac{9}{45} \) | |
| \( \frac{6}{45} \) |