1. 5.6 Finding Percent of Change
I can find percents of increase and percents of decrease.

2. Percent Change
Expresses an amount of change as a percent of an original amount.
If a new amount is greater, the change is a percent increase.
If a new amount is less, it is a percent decrease.
Ratio of the amount of change to the original amount
Percent of change = 𝑏𝑖𝑔𝑔𝑒𝑟 𝑎𝑚𝑜𝑢𝑛𝑡−𝑠𝑚𝑎𝑙𝑙𝑒𝑟 𝑎𝑚𝑜𝑢𝑛𝑡 𝑜𝑟𝑖𝑔𝑖𝑛𝑎𝑙 𝑎𝑚𝑜𝑢𝑛𝑡 ∙ 100

3. Finding a Percent Change
A coat is on sale for $ The original price was $82. what is the discount expressed as a percent change?
This is a percent decrease.
𝑏𝑖𝑔𝑔𝑒𝑟−𝑠𝑚𝑎𝑙𝑙𝑒𝑟 𝑜𝑟𝑖𝑔𝑖𝑛𝑎𝑙
82− =
≈0.09, or 9% decrease

4. You Try!
A store buys an electric guitar for $295 and marks up the price to $340. What is the markup expressed as a percent change?
≈15%

5. Assignment
Odds
P.205 #9-31