There are 40 students in the first class of five years. Today, one person asks for leave due to illness. What is the attendance rate of the first class of five years?
五年一班有学生40人，今天有1人因病请假，五年一班今天的出勤率是多少．
<gadget id="calculator">40 - 1</gadget>
<output>39</output>

<gadget id="calculator">39 / 40</gadget>
<output>39/40 = around 0.975</output>

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

<gadget id="calculator">(39/40) * 1</gadget>
<output>39/40 = around 0.975</output>

<result>39/40 = around 0.975</result>