The students in class 3 and 5 are divided into 8 groups on average. What percentage of the total number of students in each group account for the whole class? What about 4 groups? What is considered as the unit "1" here?
三5班学生平均分成8个小组，每组学生的人数占全班人数的几分之几？4个小组呢？这里把什么看作单位"1"？
<result>1</result>