In fifth grade at lenape elemantary school, there are 4/7 as many girls as there are boys. There are 66 students in fifth grade. How many students are girls?

Answer: there are 24 girls.

Step-by-step explanation:

Let x represent the number of boys in fifth grade at lenape elemantary school.

In fifth grade at lenape elemantary school, there are 4/7 as many girls as there are boys. This means that the number of girls in the school would be

4/7 * x = 4x/7

There are 66 students in fifth grade. This means that

x + 4x/7 = 66

Cross multiplying by 7, it becomes

7x + 4x = 462

11x = 462

x = 462/11

x = 42

The number of girls would be

66 - 42 = 24