In a certain math test, 28 people in class 61 passed and 7 people failed. What is the passing rate of this math test?
在某次数学测验中，六1班28人及格，7人不及格这次数学测验的及格率是多少．
<gadget id="calculator">28 + 7</gadget>
<output>35</output>

<gadget id="calculator">28 / 35</gadget>
<output>4/5 = around 0.8</output>

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

<gadget id="calculator">(4/5) * 1</gadget>
<output>4/5 = around 0.8</output>

<result>4/5 = around 0.8</result>