6. There are 50 students in class 1. In a test, 5 people failed. What is the passing rate?
6.1班有50人，在一次测试中，不及格的有5人，及格率为多少．
<gadget id="calculator">50 - 5</gadget>
<output>45</output>

<gadget id="calculator">45 / 50</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>