To rewrite \( 216^{\frac{1}{3}} \) using properties of exponents, we can recognize that \( 216^{\frac{1}{3}} \) means the cube root of 216. This can also be written as:
\[ 216^{1/3} \]
Thus, the rational exponent on this expression is \( \frac{1}{3} \).
Hence, the correct response is:
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