[tex]( \frac{3}{5}) ^{4} : {( \frac{3}{5}) }^{3} = \frac{ {3}^{4} }{ {5}^{4} } : ( \frac{3}{5}) ^{3} = \frac{81}{625} : {( \frac{3}{5}) }^{3} = \frac{81}{625} : \frac{ {3}^{3} }{ {5}^{3} } = \frac{81}{625} : \frac{27}{125} = \frac{81}{625} \times \frac{125}{27} = \frac{81 \times 125}{625 \times 27} = \frac{10125}{16875} = \frac{3}{5} [/tex]
