The attendance rate of Class 51 today is 98%, 1 person asks for sick leave, how many original students are there in Class 51?
五1班今天的出勤率是98%，1人请病假，五1班原有学生多少人．
<gadget id="calculator">98 / 100</gadget>
<output>49/50 = around 0.98</output>

<gadget id="calculator">1 - (49/50)</gadget>
<output>1/50 = around 0.02</output>

<gadget id="calculator">1 / (1/50)</gadget>
<output>50</output>

<result>50</result>