In a math problem, there are 50 students in the class, 5 of them get it wrong, what is the error rate?
一道数学题，全班50名同学，5人做错，错误率是多少．
<gadget id="calculator">5 / 50</gadget>
<output>1/10 = around 0.1</output>

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

<gadget id="calculator">(1/10) * 1</gadget>
<output>1/10 = around 0.1</output>

<result>1/10 = around 0.1</result>