To evaluate \( \left( \frac{5}{4} \right)^{-3} \), we can use the property of exponents that states \( a^{-n} = \frac{1}{a^n} \). Thus, we have:
\[ \left( \frac{5}{4} \right)^{-3} = \frac{1}{\left( \frac{5}{4} \right)^3} \]
Next, we calculate \( \left( \frac{5}{4} \right)^3 \):
\[ \left( \frac{5}{4} \right)^3 = \frac{5^3}{4^3} = \frac{125}{64} \]
Now we can substitute this back into our equation:
\[ \left( \frac{5}{4} \right)^{-3} = \frac{1}{\frac{125}{64}} = \frac{64}{125} \]
Thus, the value of \( \left( \frac{5}{4} \right)^{-3} \) is \( \frac{64}{125} \).
Therefore, the correct response is:
64 over 125 (or \( \frac{64}{125} \)).