and B can complete the same task in 4 days and 6 days respectively. What is the ratio of the working hours of A and B?
甲乙两人完成同一任务，所需要的时间分别是4天和6天．那么甲乙两人工作的时间的比值为多少．
<gadget id="calculator">4 / 6</gadget>
<output>2/3 = around 0.666667</output>

<result>2/3 = around 0.666667</result>