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 \( \frac{4}{3} \) + \( \frac{5}{7} \)?
| \( \frac{2}{5} \) | |
| 2\(\frac{1}{21}\) | |
| 1 \( \frac{4}{9} \) | |
| \( \frac{7}{21} \) |