people in a class ask for leave a day due to illness, and 2 people ask for leave due to business. There are 45 people in this class today. What is the attendance rate?
某班一天因病请假3人，因事请假2人，该班今天出勤45人，出勤率为百分之几？
<gadget id="calculator">3 + 2 + 45</gadget>
<output>50</output>

<gadget id="calculator">45 / 50</gadget>
<output>9/10 = around 0.9</output>

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

<gadget id="calculator">(9/10) * 1</gadget>
<output>9/10 = around 0.9</output>

<result>9/10 = around 0.9</result>