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 \( \frac{3}{3} \) - \( \frac{6}{7} \)?
| \(\frac{1}{7}\) | |
| 2 \( \frac{1}{21} \) | |
| \( \frac{7}{21} \) | |
| 2 \( \frac{9}{21} \) |