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 \( \frac{3}{3} \) - \( \frac{4}{7} \)?
| \( \frac{6}{21} \) | |
| \(\frac{3857}{9000}\) | |
| 1 \( \frac{5}{10} \) | |
| \( \frac{9}{21} \) |