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