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 \( \frac{2}{4} \) - \( \frac{3}{10} \)?
| 2 \( \frac{1}{10} \) | |
| \(\frac{1}{5}\) | |
| 2 \( \frac{6}{20} \) | |
| \( \frac{9}{20} \) |