The elementary second-order liquid phase reaction A + B ā C + D is carried out in an isothermal plug flow reactor of 2 m^3 volume. The inlet volumetric flow rate is 10 m^3/h. The initial concentrations of both A and B are 2 kmol/m^3. The rate constant is given as 2.5 m^3 kmol^-1 h^-1. Find the percentage conversion of A.