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 \( \frac{3}{3} \) - \( \frac{5}{7} \)?
| \( \frac{1}{21} \) | |
| 2 \( \frac{6}{14} \) | |
| \(\frac{2}{7}\) | |
| 2 \( \frac{4}{21} \) |