There are 40 students in Class 1 of Grade 6, 2 of them asked for leave yesterday due to illness, and all of them came to school today. What was the attendance rate of this class yesterday?
六年级一班有40名学生，昨天因病请假2人，今天全部到校上课．这个班昨天的出勤率是多少．
<gadget id="calculator">40 - 2</gadget>
<output>38</output>

<gadget id="calculator">38 / 40</gadget>
<output>19/20 = around 0.95</output>

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

<gadget id="calculator">(19/20) * 1</gadget>
<output>19/20 = around 0.95</output>

<result>19/20 = around 0.95</result>