\(=\frac{4\cdot7}{9\cdot5}\cdot\frac{9}{7}\)
\(=\frac{28\cdot9}{45\cdot7}\)
\(=\frac{252}{315}=\frac{4}{5}\)
\(\frac{4}{9}\times\frac{7}{5}\div\frac{7}{8}\)
\(=\frac{4}{9}\times\frac{7}{5}\times\frac{8}{7}\)
\(=\frac{4\times7\times8}{9\times5\times7}\)
\(=\frac{32}{45}\)
\(\frac{4}{9}\)X\(\frac{7}{5}\)X\(\frac{9}{7}\)=\(\frac{4}{9}\)X\(\frac{9}{5}\)=\(\frac{4}{5}\)