The number of boys in class 6 (2) is 8 / 9 of that of girls. After one girl is transferred, the number of boys is 6 / 7 of that of girls How many people are there?

The number of boys in class 6 (2) is 8 / 9 of that of girls. After one girl is transferred, the number of boys is 6 / 7 of that of girls How many people are there?

There is no change in the number of boys before and after, so boys are regarded as a unit. In the past, girls accounted for 9 / 8 of the number of boys, but later girls accounted for 7 / 6 of the number of boys. 9 / 8 minus 7 / 6 got 1 / 24, so the more girls accounted for 1 / 24 of the number of boys, so 1 divided by 1 / 24 got the number of boys 24, 24 multiplied by 9 / 8 got the number of girls 27

The number of boys in class 6 (2) is 8 / 9 of that of girls. When one girl is transferred, the number of boys is 6 / 7 of that of girls,
How many boys and girls were there in class 6 (2)?

Because the number of male students remains unchanged, the number of male students is regarded as the unit "1",
In the past, the number of female students was 9-8 times that of male students. Now, the number of female students is 7-6 times that of male students,
Then the number of male students is 1 ÷ (7-6-9-8) = 24,
There are 27 female students