\[\left( 2\frac{3}{5} \right)^{15} \cdot \left( \frac{5}{13} \right)^{14} = \frac{13^{15} \cdot 5^{14}}{5^{15} \cdot 13^{14}} =\]
\[= \frac{13}{5} = 2\frac{3}{5} = 2,6\]