After a workshop is reformed, the number of personnel is reduced by 20%, and when the working hours are increased by 20%, the output is increased by 50% compared to the original, and how much the work efficiency is improved.
一个车间改革后，人员减少20%，当工作时间增加20%后，产量比原来增加50%，工作效率提高多少．
<gadget id="calculator">50 / 100</gadget>
<output>1/2 = around 0.5</output>

<gadget id="calculator">1 + (1/2)</gadget>
<output>3/2 = around 1.5</output>

<gadget id="calculator">20 / 100</gadget>
<output>1/5 = around 0.2</output>

<gadget id="calculator">1 + (1/5)</gadget>
<output>6/5 = around 1.2</output>

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

<gadget id="calculator">(3/2) / (6/5) / (4/5)</gadget>
<output>25/16 = around 1.5625</output>

<gadget id="calculator">(25/16) - 1</gadget>
<output>9/16 = around 0.5625</output>

<result>9/16 = around 0.5625</result>