A project was originally planned to be completed in 60 days, but it actually took only 50 days. How much has the work efficiency been improved?
一项工程，原计划60天完成，实际只用了50天，工作效率提高了多少
<gadget id="calculator">1 / 50</gadget>
<output>1/50 = around 0.02</output>

<gadget id="calculator">1 / 60</gadget>
<output>1/60 = around 0.016667</output>

<gadget id="calculator">(1/50) - (1/60)</gadget>
<output>1/300 = around 0.003333</output>

<gadget id="calculator">(1/300) / (1/60)</gadget>
<output>1/5 = around 0.2</output>

<result>1/5 = around 0.2</result>