1、

Class one is more than class two 1/5.

Suppose one is person A and the other is person B,

Then a = b+b/5 = 6b/5.

So a:b=6:5

That is, the number of people in class one: the number of people in class two = 6: 5.

namely

Class one accounts for 6/ 1 1 of the total number of students.

The number of students in Class Two accounts for 5/ 1 1 of the total number of students.

2

There are more boys than girls in Class One 1/4.

Suppose a class of boys is C and girls are D,

Then c = d+d/4 = 5d/4.

That is, a class of boys: a class of girls = 5: 4.

namely

Boys in Class One account for 5/9 of the class.

Girls in Class One account for 4/9 of the class.

3、

There are more boys than girls in Class Two 1/8.

Suppose there are m boys in Class Two and n girls in Class Two.

Then m = n+n/8 = 9n/8.

Boys in Class Two: Girls in Class Two =9:8.

namely

Boys in Class Two account for 9/ 17 of Class Two.

Girls in Class Two account for 8/ 17 of Class Two.

4、

Ratio of male to female in two classes

Boys in two classes = 6/11× 5/9+5/1× 9/17 = 915/(9×1×

Girls in two classes = 6/11× 4/9+5/1× 8/17 = 768/(9×1×1.

So boys in two classes: girls in two classes = 9 15: 768 = 305: 256.