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 \( \frac{9}{4} \) + \( \frac{2}{10} \)?
| 1 \( \frac{5}{20} \) | |
| 2 \( \frac{1}{4} \) | |
| 1 \( \frac{4}{12} \) | |
| 2\(\frac{9}{20}\) |