Li Hua originally planned to complete the work in 12 hours, but it was completed in 10 hours. How much has her work efficiency improved compared to the original plan?
李华原计划12小时完成的工作，结果10小时就完成了，她的工作效率比原计划提高了多少
<gadget id="calculator">1 / 10</gadget>
<output>1/10 = around 0.1</output>

<gadget id="calculator">1 / 12</gadget>
<output>1/12 = around 0.083333</output>

<gadget id="calculator">(1/10) - (1/12)</gadget>
<output>1/60 = around 0.016667</output>

<gadget id="calculator">(1/60) / (1/12)</gadget>
<output>1/5 = around 0.2</output>

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