To express a mixed number as an improper fraction, multiply the whole number by the denominator and add the numerator.<br><br>
• \(3\frac{3}{7} = \frac{3 \times 7 + 3}{7}\)<br>
• \(= \frac{21 + 3}{7} = \frac{24}{7}\)<br><br>
Final Answer: A: \(\frac{24}{7}\)