\(\frac{24}{42} \div \frac{25}{35}\)
\(= \frac{24}{42} \times \frac{35}{25}\)
\(= \frac{4 \times 6}{6 \times 7} \times \frac{5 \times 7}{5 \times 5}\)
\(= \frac{4}{7} \times \frac{7}{5}\)
\(= \frac{4 \times 7}{7 \times 5}\)
\(= \frac{28}{35}\)
\(= \frac{4}{5}\)