A worker planned to finish a batch of parts at 10 o'clock, but finished it in 8 hours. How much has the worker's work efficiency been improved?
某工人计划10时完成一批零件，结果8小时就做完了，这位工人的工作效率提高了多少
<gadget id="calculator">1 / 8</gadget>
<output>1/8 = around 0.125</output>

<gadget id="calculator">1 / 10</gadget>
<output>1/10 = around 0.1</output>

<gadget id="calculator">(1/8) - (1/10)</gadget>
<output>1/40 = around 0.025</output>

<gadget id="calculator">(1/40) / (1/10)</gadget>
<output>1/4 = around 0.25</output>

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