In a survey of records at a major medical center, $95$ out of $550$ patients were treated for one or more nosocomial infections in the past six months. Calculate prevalence and convert into a percentage.

Group of answer choices

$16\mathrm{.}3\%$

$15\mathrm{.}1\%$

$13\mathrm{.}6\%$

$17\mathrm{.}3\%$