Question

For a field trip, 4 chaperones are needed for every 18 students. How many chaperones are needed if there were 81 students

Answer 1

18 chaperones

Explanation:

Given:

4 chaperones are needed for every 18 students.

We need to find the number of chaperones for 81 students.

Solution:

first we find chaperones for each student.

For 18 students = 4 chaperones

For each student =
`(4)/(18)`

Divided by 2 both numerator and denominator.

For each student
`=(2)/(9)`

So,
`(2)/(9)` chaperones for each student

But we need to find for 81 students, so chaperones For 81 students
`= number\ of\ students* chaperones\ for\ each\ student`

`=81* (2)/(9)`

`=9* 2`

`= 18\ chaperones`

Therefore, 18 chaperones are needed for 81 students.