The equivalent conductance of an infinitely dilute solution of ${\mathrm{NH}}_4\mathrm{Cl}$ is 150 and the ionic conductance of ${\mathrm{OH}}^{-}$ and ${\mathrm{Cl}}^{-1}$ ions are 198 and 76 respectively. If the equivalent conductance of a 0.01 N solution of ${\mathrm{NH}}_4\mathrm{OH}$ is 9.6. What will be its degree of dissociation?