Calculate the M$2$ measure using the following information:

Average portfolio return $=16\%$

Portfolio standard deviation $=25\%$

Average market return $=10\mathrm{.}5\%$

Market standard deviation $=20\%$

Average risk free rate $=4\%$

Express your answer in decimal notation $($e$.$g$.,0\mathrm{.}0123$ for $1\mathrm{.}23\%)$