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 \( \frac{2}{3} \) + \( \frac{2}{7} \)?
| 1 \( \frac{1}{21} \) | |
| \(\frac{20}{21}\) | |
| 1 \( \frac{8}{21} \) | |
| 1 \( \frac{8}{16} \) |