There are 250 students in the preparatory grade of a certain school. On a certain day, 4 people ask for leave. What is the attendance rate of this grade on this day?
某校预备年级共有学生250名．某天有4人请假，该年级这一天的出勤率是多少．
<gadget id="calculator">250 - 4</gadget>
<output>246</output>

<gadget id="calculator">246 / 250</gadget>
<output>123/125 = around 0.984</output>

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

<gadget id="calculator">(123/125) * 1</gadget>
<output>123/125 = around 0.984</output>

<result>123/125 = around 0.984</result>