Question

80% of the astronomy club members own a telescope. If 20 students own a telescope, how many students are in the astronomy club in all?

Answer 1

Answer:

25 students

Step-by-step explanation:

Let x represent the amount of students in the astronomy club then:

80%x=20

Convert 80% to a fraction. Any percentage is that number over 100:

$\frac{80}{100}x=20$

Simplify the fraction:

$\frac{8}{10}x=20$

$\frac{4}{5}x=20$

Multiply both sides by 5:

$4x=100$

Divide both sides by 4:

$x=25$

There are 25 students in the astronomy club.