The number of boys in the school accounts for 45%, and the students who can swim account for 54%. 72% of the boys can swim. How many percent of the girls can't swim among all the students?
学校男生人数占45%，会游泳的学生占54%．男生中会游泳的占72%，问在全体学生中不会游泳的女生占百分之几？
<gadget id="calculator">45 / 100</gadget>
<output>9/20 = around 0.45</output>

<gadget id="calculator">1 - (9/20)</gadget>
<output>11/20 = around 0.55</output>

<gadget id="calculator">54 / 100</gadget>
<output>27/50 = around 0.54</output>

<gadget id="calculator">72 / 100</gadget>
<output>18/25 = around 0.72</output>

<gadget id="calculator">(9/20) * (18/25)</gadget>
<output>81/250 = around 0.324</output>

<gadget id="calculator">(27/50) - (81/250)</gadget>
<output>27/125 = around 0.216</output>

<gadget id="calculator">(11/20) - (27/125)</gadget>
<output>167/500 = around 0.334</output>

<result>167/500 = around 0.334</result>