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 \( \frac{9}{4} \) - \( \frac{3}{10} \)?
| 1\(\frac{19}{20}\) | |
| 2 \( \frac{3}{9} \) | |
| 2 \( \frac{9}{20} \) | |
| 2 \( \frac{9}{15} \) |