$d = 9.17 \times 10^{-11}\,m$

From $\mu = e \times d$

          $\mu = 1.60 \times 10^{-19} \times 9.17 \times 10^{-11}$

          $= 14.672 \times 10^{-30}$

$\%$ ionic character $ = \frac{{Observed\,dipole\,moment}}{{Dipole\,moment\,for\,100\% \,ionic\,bond}}$

$ = \frac{{6.104 \times {{10}^{ - 30}}}}{{14.672 \times {{10}^{ - 30}}}} \times 100$

$ = 41.5\% $