In a certain voluntary labor, 34 people actually came and 6 people asked for leave. What is the attendance rate of this voluntary labor?
某次义务劳动，实际来了34人，请假6人，这次义务劳动的出勤率是多少？
<gadget id="calculator">34 + 6</gadget>
<output>40</output>

<gadget id="calculator">34 / 40</gadget>
<output>17/20 = around 0.85</output>

<gadget id="calculator">100 / 100</gadget>
<output>1</output>

<gadget id="calculator">(17/20) * 1</gadget>
<output>17/20 = around 0.85</output>

<result>17/20 = around 0.85</result>