Xiao Hua participated in a math competition, and she got 2 wrong answers out of 20 questions. What is the correct rate of her answers?
小花同学参加数学竞赛，20道题中她答错了2道，她答题的正确率是多少．
<gadget id="calculator">20 - 2</gadget>
<output>18</output>

<gadget id="calculator">18 / 20</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>