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