1. Percentages
8/21/2017

2. General strategy Understand the problem.
read and reread the problem
Choose a variable to represent the unknown
Construct a drawing
Translate the problem into an equation
Solve the equation
Interpret the results

3. Example 1 The number 63 is what percent of 72?
The number 120 is 15% of what number

4. Example 2 Discounts
Cell Phones Unlimited recently reduced the price of the $140 phone by 20%. What is the discount and the new price of the phone?
A new treadmill was purchased for $480 and later sold at a garage sale at a discount of 85%. What is the discount and the new price of the treadmill?

5. Example 3
The tuition and fees of attending a four year college rose from $4020 in 1996 to $7610 in Find the percent of increase.
The tuition and fees cost of attending a two year college rose from $1900 in 1996 to $2710 in Find the percent of increase.

6. Bell Ringer 8/22/2017
The number 74 is what percent of 117

7. Example 4
Find last year’s salary if, after a 4% raise, this year’s salary is $44,200.
A gasoline station decreased the price of a $0.95 soda by 15%. What is the new price of the soda?

8. Due today The number 45 is what percent of 180
The number 126 is 35% of what number
A used automobile dealership recently reduced the price of a used car by 8%. If the price of the car before was $18,500, what was the discount and the new price?
A birthday celebration meal is $ including tax. Find the total cost if a 15% tip is added to the given cost.