Question

Set up and solve a proportion: On average, I can answer 14 out of 21 questions correctly in a trivia game. Assuming

this situation is proportional, how many MORE questions am I likely to get correct if there are 30 questions in all?

Answer 1

20

Explanation:

Since this is a ratio problem we first plug in all that we know

14:x

21:30

Now we find a way to get from 21 to 30

The ratio 14:21 can be simplified if we divide each by 7 give us 2:3

Now we plug the new ratio in

2:x

3:30

We get from 3 to 30 by multiplying by 10 so we also multiply 2 by 10 and we get 20