In an estimation of sulphur by Carius method 0.2 g of the substance gave 0.6 g of BaSO_4. The percentage of sulphur in the substance is ____ %.…

In an estimation of sulphur by Carius method $\displaystyle 0.2$ g of the substance gave $\displaystyle 0.6$ g of $\displaystyle \mathrm{BaSO}_4$. The percentage of sulphur in the substance is $\displaystyle \_\_\_\_$%. (Given molar mass in $\displaystyle \mathrm{g} \mathrm{mol}^{-1} \mathrm{~S}: 32, \mathrm{BaSO}_4: 231$ )