There are 400 students in the sixth grade. During the mid-term math self-examination, 1 person asked for sick leave and 10 failed. What is the passing rate of the mid-term math self-examination?
六年级有400人，期中数学自查中，1人请病假，10人不合格，求期中数学自查的合格率？
<gadget id="calculator">400 - 1 - 10</gadget>
<output>389</output>

<gadget id="calculator">389 / 400</gadget>
<output>389/400 = around 0.9725</output>

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

<gadget id="calculator">(389/400) * 1</gadget>
<output>389/400 = around 0.9725</output>

<result>389/400 = around 0.9725</result>