Percent of Change

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Percent of Change
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Formula
To change a decimal to a percent move the
decimal two places to the right and add a percent
symbol.
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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?
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Example 2
To use a payphone in the 1950s it cost 0.10.
Today it costs 0.35. What is the percent of
increase?
0
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Example 3
The price of a widget has gone up by 16?, or
10. What is the old price?
Amount of change 0.10
Percent of change as a decimal 0.1667
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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 3000 195 3195
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Percent of Change
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