Electrochemistry

In an electrochemical reaction of lead, at standard temperature, if \(\mathrm{E}^{0}\left(\mathrm{~Pb}^{2+} / \mathrm{Pb}\right)=\mathrm{m}\) Volt and \(\mathrm{E}^{0}\left(\mathrm{~Pb}^{4+} / \mathrm{Pb}\right)=\mathrm{n}\) Volt, then the value of \(\mathrm{E}^{0}\left(\mathrm{~Pb}^{2+} / \mathrm{Pb}^{4+}\right)\) is given by \(\mathrm{m-x n}\). The value of \(\mathrm{x}\) is ___________. (Nearest integer)