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 \( \frac{7}{9} \) - \( \frac{7}{15} \)?
| 1 \( \frac{9}{45} \) | |
| 1 \( \frac{7}{16} \) | |
| 2 \( \frac{6}{13} \) | |
| \(\frac{14}{45}\) |