A's 10-day workload is exactly the same as B's 12-day workload, so how much is B's work efficiency than A's.
甲10天的工作量正好乙12天的工作量相同，那么乙的工作效率是甲的多少．
<gadget id="calculator">1 / 12</gadget>
<output>1/12 = around 0.083333</output>

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

<gadget id="calculator">(1/12) / (1/10)</gadget>
<output>5/6 = around 0.833333</output>

<result>5/6 = around 0.833333</result>