The time to complete a job is shortened from 8 hours to 6 hours, how much work efficiency has been improved
完成一项工作的时间由8小时缩短到6小时，工作效率提高了多少
<gadget id="calculator">1 / 6</gadget>
<output>1/6 = around 0.166667</output>

<gadget id="calculator">1 / 8</gadget>
<output>1/8 = around 0.125</output>

<gadget id="calculator">(1/6) - (1/8)</gadget>
<output>1/24 = around 0.041667</output>

<gadget id="calculator">(1/24) / (1/8)</gadget>
<output>1/3 = around 0.333333</output>

<result>1/3 = around 0.333333</result>