Xiaohua did 5 questions and got 1 wrong. What is Xiaohua's error rate for this assignment?
小华做了5道题，错了1道，小华这次作业的错误率是多少．
<gadget id="calculator">1 / 5</gadget>
<output>1/5 = around 0.2</output>

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

<gadget id="calculator">(1/5) * 1</gadget>
<output>1/5 = around 0.2</output>

<result>1/5 = around 0.2</result>