It takes 8 minutes for A to process a batch of parts, and 10 minutes for B. How much lower is the work efficiency of B than that of A?
加工一批零件，甲用了8分钟，乙用了10分钟，乙的工作效率比甲的工作效率低多少
<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) / (1/8)</gadget>
<output>1/5 = around 0.2</output>

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