Question

A survey showed that 82% of youth most often used the internet at home. What fraction of youth surveyed most often use the internet somewhere else?

Answer 1

Answer: 18% of youth used the internet elsewhere.

Explanation:

At first, this problem might seem confusing since there could be places other than home with different percentages, and it feels as if you don't know enough to solve the problem.

But in reality, it breaks down to home or any other place in the world! If you're not at home, you need to exist somewhere.

So, it's actually as simple as 100% (you cannot have a total greater than 100% in the real world) - 82% = 18%

So, 18% of youth used internet in a place other than home.