There are 50 students in Class 201. Today, 2 of them ask for sick leave and 1 ask for personal leave. Find today's attendance rate.
201班有50名学生，今天2人请病假，1人请事假．求今天的出席率．
<gadget id="calculator">50 - 2 - 1</gadget>
<output>47</output>

<gadget id="calculator">47 / 50</gadget>
<output>47/50 = around 0.94</output>

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

<gadget id="calculator">(47/50) * 1</gadget>
<output>47/50 = around 0.94</output>

<result>47/50 = around 0.94</result>