What is the percentage ionic character of $KCl$ given the following: The dipole moment of $KCl$ is $3.336 \times 10^{-29} \text{coulomb-meter}$. The interatomic distance between $K^{+}$ and $Cl^{-}$ is $2.6 \times 10^{-10}\;m$.

Question

$\begin{array}{1 1} 75.32 \% \\ 47.96 \% \\ 77.93 \\ 80.09 \% \end{array}$