There are 240 male employees in a factory, accounting for 80% of the number of female employees. What is the correct formula for finding how many percent more female employees are than male employees?
某厂有男职工240人，占女职工人数的80%，求女职工比男职工多百分之几的正确算式是多少
<gadget id="calculator">80 / 100</gadget>
<output>4/5 = around 0.8</output>

<gadget id="calculator">240 / (4/5)</gadget>
<output>300</output>

<gadget id="calculator">300 - 240</gadget>
<output>60</output>

<gadget id="calculator">60 / 240</gadget>
<output>1/4 = around 0.25</output>

<result>1/4 = around 0.25</result>