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 \( \frac{9}{4} \) - \( \frac{8}{10} \)?
| \( \frac{4}{20} \) | |
| 1\(\frac{9}{20}\) | |
| 2 \( \frac{1}{7} \) | |
| 1 \( \frac{1}{5} \) |