1. PERCENT INCREASE DECREASE

2. Vocab
Percent of Change- When a value changes, whether increase or decrease, by a certain amount.
Example: From $40 to $46. What percent increase is this?
or- temperature from 70 degrees to 55 degrees. What percent decrease is this.

3. Example sample
Rule: Find the difference of the two numbers then place that # over the original #
Example: From $40 to $46. What percent increase is this?
40−46=6 put 6 over = = = 15%
or- temperature from 70 degrees to 55 degrees. What percent decrease is this.
70−55=15 put 15 over = = = 21%

4. RATIO EXAMPLE Example: From $40 to $46. What percent increase is this?
6 40 = 𝑥 100
or- temperature from 70 degrees to 55 degrees. What percent decrease is this.
= 𝑥 100

5. YOU DO PICK one of the 3
A student went from 60 points in class to 90 points in class. What percent increase is this?
An iPad went on sale from $800 to $600. What percent decrease is this?
The population of Scottsdale went from 25,000people to 35,000 people in a year. What percent increase is this.