Equivalent conductance at infinite  dilution of $N{H}_{4}Cl, NaOH$  and  $NaCl$ are 129.8, 217.4, and 108.9 ${\Omega }^{-1}c{m}^{2}mo{l}^{-1}$  respectively. If the equivalent conductance of $0.01N$ solution of  $N{H}_{4}OH$ is  $9.532{\Omega }^{-1}c{m}^{2}mo{l}^{-1}$. Degree of dissociation of $N{H}_{4}OH$  at this temperature is _____ %