The number of male workers in the first workshop of a textile factory is 20% of the total number of workers in the workshop, how much less male workers than female workers.
纺织厂一车间男工是全车间人数的20%，男工比女工少多少．
<gadget id="calculator">20 / 100</gadget>
<output>1/5 = around 0.2</output>

<gadget id="calculator">1 - (1/5)</gadget>
<output>4/5 = around 0.8</output>

<gadget id="calculator">(4/5) - (1/5)</gadget>
<output>3/5 = around 0.6</output>

<gadget id="calculator">(3/5) / (4/5)</gadget>
<output>3/4 = around 0.75</output>

<result>3/4 = around 0.75</result>