1. Percent of Change

2. To find the percent of change:
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3. Example #1
If a stock was $15 yesterday, and today it closed at $13. What is the percent of decrease?
What is the amount of change?
Amount of Change
Original Amount
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4. Example #2
To use a payphone in the 1950’s it cost $0.10. Today it costs $0.35. What is the percent of increase?
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5. Example #3
The price of a widget has gone up by 16⅔%, or 10¢. What is the old price?
Amount of change = 0.10
Percent of change as a decimal =
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6. If Matt bought a motorcycle for $3000, how much would the tax be
If Matt bought a motorcycle for $3000, how much would the tax be? What would his total cost be?
Sales tax is 6.5% or 0.065
Tax = $195
Total Cost = $ $195 = $3195

7. Percent of Change
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