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 \( \frac{8}{8} \) - \( \frac{9}{10} \)?
| \(\frac{1}{10}\) | |
| \( \frac{1}{40} \) | |
| 2 \( \frac{6}{40} \) | |
| \( \frac{4}{40} \) |