\[\left( \frac{3}{5} \right)^{- 4} = \left( \frac{5}{3} \right)^{4};\ \left( \frac{5}{3} \right)^{- 4};\ \frac{3}{5} = \left( \frac{5}{3} \right)^{- 1};\text{\ \ }\left( \frac{5}{3} \right)^{0}\]
\[\left( \frac{5}{3} \right)^{- 4} < \left( \frac{5}{3} \right)^{- 1} < \left( \frac{5}{3} \right)^{0} < \left( \frac{5}{3} \right)^{4}\]
\[\left( \frac{5}{3} \right)^{- 4} < \frac{3}{5} < \left( \frac{5}{3} \right)^{0} < \left( \frac{3}{5} \right)^{- 4}.\]