There are 360 students in the sixth grade of Guangming primary school. The number of students in the fifth grade is one fifth less than that in the sixth grade. How many people are there in the fifth grade less than that in the sixth grade?

There are 360 students in the sixth grade of Guangming primary school. The number of students in the fifth grade is one fifth less than that in the sixth grade. How many people are there in the fifth grade less than that in the sixth grade?

Less = 360 * 1 / 5 = 72

There are 360 students in grade six of Guangming primary school,

360x (1-1 / 5) = 360x4 / 5 = 288 people

There are 48 students in class 1 of grade 6 in a school, with boys accounting for 5 / 12 of the class. How many boys are transferred later, with boys accounting for 11 / 25 of the class?
Come on, it's going to be done today

Let's turn to x boys
48*5/12=20
（48+x）*(11/25)=20+x
x=2

There are 48 students in a certain class, among which girls account for 3 / 8. Now there are several girls transferred, so girls account for 2 / 5 of the total number of students in the class
Number of people
Don't be quick

The original number of female students is 48 * 3 / 8 = 18
Boys: 48-18 = 30
Transfer in number = (48 * 2 / 5-18) / (1-2 / 5) = 2