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 \( \frac{7}{9} \) - \( \frac{9}{15} \)?
| 1 \( \frac{4}{7} \) | |
| 1 \( \frac{6}{45} \) | |
| 1 \( \frac{3}{45} \) | |
| \(\frac{8}{45}\) |