The school held a mathematics competition. 27 people participated and 3 people were absent. What is the participation rate of this competition?
学校举行数学比赛，有27人参加，3人缺席，这次比赛的参赛率是多少
<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>