1. Example 1 Use Ratios Brandy paid $6.75 for 3 pounds of mixed nuts. At this price how much would 5 pounds cost? Let x represent the price for 5 pounds of mixed nuts. Plan Write a proportion for the problem. *Since the rates are equal, they form a proportion. So, Brandy can buy 5 pounds of mixed nuts for $11.25.

2. Example 2 Use a Scale Drawing  Jane wants to make a doll that is a replica of a friend. The scale that she will use is 1 centimeter on the doll will represent 2 inches on her friend. Her friend’s foot measure is 8.5 inches. What will be the size of the doll’s foot?  The size of the doll’s foot will be 4.25 centimeters.

3. Example 3 Find Percent of Change State whether each percent of change is a percent of increase or a percent of decrease. Then find each percent of change. a. original: 18 b. original: 125 new: 18.99 new: 106.25 The percent of increase is 5.5%. The percent of decrease is 15%.

4. Example 4 Find the Missing Value Due to hard times at his company, Jared was told that his salary would be cut by 10%. If Jaredwas making $62,000, what will his new salary be? Jared’s new salary will be $55,800.

5. Example 3 Find Amount After Sales Tax A mountain bike costs $675. If the sales tax is 5.25%, what is the total price of the bike? The total price of the mountain bike is $710.44.

6. Example 4 Find Amount After Discount A magazine subscription is $52 a year if you buy it every week off the newsstand. If you buy a subscription, you can buy it at a 15% discount, what is the discounted price. The discounted price of the magazine subscription is $44.20.