Problem Solving with Percents

Each of the problems below is a link. If you click on the problem, it will take you to a YouTube video of a full, step-by-step solution for the problem. You may try these problems as practice and use the videos to check your answer, or you can just watch the videos to see more worked-out example problems.

If you earned 38 points out of the 50 total points on your algebra test, what was your score as a percent?
There were 350 seniors at Preston Senior High School in 2004. If 68% of the seniors voted for Pedro for senior class president, how many seniors voted for Pedro?
A car salesman earned a 9% commission on the sale of a used Toyota Prius. If her commission was $1251, what was the sale price of the Prius?
Suppose a watch that was originally priced at $250 was on sale for $180. Find the discount rate (percent of decrease) in the price of the watch.