Question

Last one question answer please tell

Answer 1

$\frac{x}{y} = {( \frac{3}{5} )}^{ - 3} \times { (\frac{5}{2}) }^{ - 3} \\ \\ \: \: \: \: \: = {( \frac{3}{5} \times \frac{5}{2} ) }^{ - 3} \\ \\ \: \: \: \: \: = (\frac{3}{2}) ^{ - 3} = {( \frac{2}{3} )}^{3} = { \green{\frac{8}{27} }}$

Now,

${( \frac{x}{y} )}^{ - 1} = {( \frac{8}{27} )}^{ - 1} = { \red{\frac{27}{8} }}$