Anticipatory Set/Opening Activity: Transparency 3-7
1. Does the pair of ratios, (17/34) and (3/12), form a proportion? Write yes or no.
Solve each proportion.
2. (7/8)=(35/x)
3. (0.6/b)=(12/30)
4. (11/4) = (z/5)
5. A bottling machine can fill 210 bottles every 5 minutes. How many bottles can it fill in one hour?
6. What is the measure of the largest angle in the triangle shown? (diagram not included)

Specific Lesson Outline and Notes
Percent of change: an increase or decrease that is expressed as a change.
Percent of increase: the new number is greater than the original number.
Percent of decrease: the new number is less than the original number.

To find % of change: (new-original/original)
If + : increase
If - : decrease

Ex1: State whether each percent of change is a percent of increase or decrease. Then find each percent of change.
A. original: 32 ; New: 40
B. original: 20 ; New: 4

Ex2: The price a used-book store pays to buy a book is $5. The store sells the book for 28% above the price that it pays for the book. What is the selling price of the $5 book?

Sales tax: tax that is added to the cost of an item.
Discount: amount by which the regular price of an item is reduced.

Ex3: A meal for two at a restaurant costs $32.75. If the sales tax is 5%, what is the total price of the meal?

Ex4: A dog toy is on sale for 20% off the original price. If the original price of the toy is $3.80, what is the discounted price?

Quiz 3:4-6 tomorrow
Homework p. 162 # 2,3,14-19,26-28,31-33,40-49