An acidic solution of dichromate is electrolyzed for 8 minutes using 2 A current. As per the following equation
$\mathrm{Cr}_2 \mathrm{O}_7^{2-}+14 \mathrm{H}^{+}+6 \mathrm{e}^{-} \rightarrow 2 \mathrm{Cr}^{3+}+7 \mathrm{H}_2 \mathrm{O}$
The amount of $\mathrm{Cr}^{3+}$ obtained was 0.104 g . The efficiency of the process (in\%) is (Take : F = 96000 C , At. mass of chromium = 52) $\_\_\_\_$ .