Chapter Questions
What is a ratio, and how is it different from a proportion?
If you're given a ratio of one quantity to another, what can you say about the total number of quantities?
Suppose the value of something increases by 20 percent. How can you calculate the final value in the fewest number of steps? What if the value decreases by 20 percent?
What is the percent change formula, and what is the biggest pitfall to avoid when using it?