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 \( \frac{3}{3} \) - \( \frac{7}{7} \)?
| 2 \( \frac{9}{13} \) | |
| 2 \( \frac{5}{14} \) | |
| 2 \( \frac{6}{21} \) |