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

Answer:

18 chaperones

Step-by-step 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 = $\frac{4}{18}$

Divided by 2 both numerator and denominator.

For each student $=\frac{2}{9}$

So, $\frac{2}{9}$ chaperones for each student

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

$=81\times \frac{2}{9}$

$=9\times 2$

$= 18\ chaperones$

Therefore, 18 chaperones are needed for 81 students.