A portfolio consists of the following securities$.$ What is the portfolio weight of Stock C$?$

Stock Number of Shares PPS

A $200$ $ $48$

B $100$ $ $33$

C $250$ $ $21$

$\mathrm{.}182$

$\mathrm{.}289$

$\mathrm{.}445$

$\mathrm{.}451$

$\mathrm{.}52$