There are 150 students in the school chorus. Today, 3 people ask for leave. What is their attendance rate?
校合唱队有学生150人，今天有3个人请假，其出勤率是多少．
<gadget id="calculator">150 - 3</gadget>
<output>147</output>

<gadget id="calculator">147 / 150</gadget>
<output>49/50 = around 0.98</output>

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

<gadget id="calculator">(49/50) * 1</gadget>
<output>49/50 = around 0.98</output>

<result>49/50 = around 0.98</result>