题目内容
20.六(3)班今天的出勤率是96%,出勤人数与缺勤人数的比是24:1.分析 把总人数看成单位“1”,出勤率是96%,那么缺勤率就是(1-96%),用出勤率比上缺勤率即可求解.
解答 解:96%:(1-96%)
=96%:4%
=96:4
=24:1
答:出勤人数与缺勤人数的比是 24:1.
故答案为:24:1.
点评 解决本题先把总人数看成单位“1”,表示出缺勤率,写出比,再化简.
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