PERCENT INCREASE DECREASE

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Presentation transcript:

PERCENT INCREASE DECREASE

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.

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 40 6 40 = 3 20 = 0.15 = 15% or- temperature from 70 degrees to 55 degrees. What percent decrease is this. 70−55=15 put 15 over 70 15 70 = 3 14 = 0.21 = 21%

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. 15 70 = 𝑥 100

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.