The attendance rate of the sixth grade today is 95%. Two people ask for leave. How many people are there in the sixth grade?
六年级今天的出勤率是95%，有两人请假，六年级有多少人．
<gadget id="calculator">95 / 100</gadget>
<output>19/20 = around 0.95</output>

<gadget id="calculator">1 - (19/20)</gadget>
<output>1/20 = around 0.05</output>

<gadget id="calculator">2 / (1/20)</gadget>
<output>40</output>

<result>40</result>