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 \( \frac{9}{8} \) - \( \frac{8}{10} \)?
| 2 \( \frac{2}{8} \) | |
| \( \frac{2}{40} \) | |
| \(\frac{13}{40}\) | |
| 2 \( \frac{4}{7} \) |