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

25 students

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:

`(80)/(100)x=20`

Simplify the fraction:

`(8)/(10)x=20`

`(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.