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 \( \frac{9}{3} \) - \( \frac{8}{7} \)?
| \( \frac{7}{21} \) | |
| \( \frac{4}{9} \) | |
| 1\(\frac{6}{7}\) | |
| 2 \( \frac{2}{21} \) |