An actress in the daytime drama Edge of Evening spends 25 minutes learning 15 lines of dialogue. At that rate, how long would it take her to learn 120 lines?
First, you do 120 divided by 15 because you think the 15 lines per 25 minutes as a rate. Since 120 divided by 15 is 8, you multiply 25 by 8 to get 200.
The ratios are 15 lines:25 minutes as 120 lines: ? minutes. You can solve this ratio and also get 200 minutes by multiplying by 8 on both sides of the first ratio.