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 \( \frac{8}{45} \) | |
| \(\frac{2}{5}\) | |
| \( \frac{4}{45} \) | |
| 2 \( \frac{3}{45} \) |