Is there any way to eliminate, destroy, decimate, ect. the radical from the denominator?

1 over $\displaystyle \frac{3x^2/5}{5^2/5}$ Those numbers are the 2/5 power, not the whole thing squared divided by 5.

I came up with $\displaystyle \frac{5}{3x} * \frac{3x^3}{125} to the 1/5 power$.

All of the second fraction is to the 1/5 exponential power.

That, however, does not solve my problem.

Thank you!