For the first time, the school selected 36 athletes to participate in sports competitions, of which (5/9) were girls. If 4 male athletes are selected for the second time, what percentage of the total number of female athletes will the number of female athletes be at this time?
学校第一次选出36名运动员参加体育比赛，其中(5/9)是女生．第二次又选了4名男运动员，这时女运动员人数占全体运动员的百分之几？
<gadget id="calculator">5 / 9</gadget>
<output>5/9 = around 0.555556</output>

<gadget id="calculator">36 * (5/9)</gadget>
<output>20</output>

<gadget id="calculator">36 + 4</gadget>
<output>40</output>

<gadget id="calculator">20 / 40</gadget>
<output>1/2 = around 0.5</output>

<result>1/2 = around 0.5</result>