There are 27 students in a class, and 3 people ask for leave. What is the attendance rate?
某班到校27人，3人请假，出勤率是多少
<gadget id="calculator">27 + 3</gadget>
<output>30</output>

<gadget id="calculator">27 / 30</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>