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 \( \frac{7}{3} \) + \( \frac{5}{7} \)?
| 2 \( \frac{2}{21} \) | |
| 3\(\frac{1}{21}\) | |
| 1 \( \frac{4}{13} \) | |
| \( \frac{4}{21} \) |