The ratio of the number of absentees in the first, second, and third workshops of a garment factory today is 3:3:4. What is the proportion of the absentees in the third workshop to the total number of absentees?
某服装厂第一、第二、第三个车间今天缺勤人数的比是3：3：4，第三车间缺勤人数占缺勤总人数的多少．
<gadget id="calculator">3 + 3 + 4</gadget>
<output>10</output>

<gadget id="calculator">4 / 10</gadget>
<output>2/5 = around 0.4</output>

<result>2/5 = around 0.4</result>