{\mathrm {EV}}_{{S}}={\mathrm {EV}}_{{100}}+\log _{2}{\frac {S}{100}}\,.{\mathrm {EV}}_{{400}}={\mathrm {EV}}_{{100}}+\log _{2}{\frac {400}{100}}={\mathrm {EV}}_{{100}}+2\,.{\mathrm {EV}}_{{50}}={\mathrm {EV}}_{\mathrm {EV}}_{{100}}={\mathrm {EV}}_{{S}}-\log _{2}{\frac {S}{100}}\,.{{100}}+\log _{2}{\frac {50}{100}}={\mathrm {EV}}_{{100}}-1\,.

__________