It takes 8 hours for Master Wang to process the same batch of parts, and 6.4 hours for Master Li. So how much more efficient is Master Li's work than Master Wang?
加工同一批零件，王师傅要用8小时，李师傅用6.4小时．那么李师傅的工作效率比王师傅高多少
<gadget id="calculator">1 / 6.4</gadget>
<output>0.15625</output>

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

<gadget id="calculator">0.15625 - (1/8)</gadget>
<output>0.03125</output>

<gadget id="calculator">0.03125 / (1/8)</gadget>
<output>0.25</output>

<result>0.25</result>