To determine the rational exponent for the expression \( \sqrt[3]{216} \), we can use the properties of exponents.
The expression \( \sqrt[3]{216} \) can be rewritten as: \[ 216^{1/3} \]
Therefore, the rational exponent on the expression equivalent to \( \sqrt[3]{216} \) is \( \frac{1}{3} \).
The correct response is: Start Fraction 1 over 3 End Fraction.