In the first sixth grade test, 425 people passed the test and 75 failed. What is the passing rate of this test?
在第一次六年级摸底考试中，成绩及格的有425人，不及格的有75人，这次考试的及格率是多少．
<gadget id="calculator">425 + 75</gadget>
<output>500</output>

<gadget id="calculator">425 / 500</gadget>
<output>17/20 = around 0.85</output>

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

<gadget id="calculator">(17/20) * 1</gadget>
<output>17/20 = around 0.85</output>

<result>17/20 = around 0.85</result>