Lesson 3-7 Percent of Change. Definitions Percent of change- When an increase or decrease is expressed as a percent, the percent is a percent of change.

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Presentation transcript:

Lesson 3-7 Percent of Change

Definitions Percent of change- When an increase or decrease is expressed as a percent, the percent is a percent of change. Percent of increase- If the new number is greater than the original number, the percent of change is a percent of increase. Percent of decrease- If the new number is less than the original, the percent of change is a percent of decrease.

State whether each percent of change is a percent of increase or a percent of decrease. Then find each percent of change. a)original: 32 new: 40

b)original: 20 new: 4

Find the total price of each item. a)software: $39.50 sales tax: 6.5%

b)compact disc: $15.99 sales tax: 5.75%

Find the discounted price of each item. a)jeans: $45.00 discount: 25%

b)book: $19.95 discount: 33%