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Percent of Change. Percent Increase Percent Decrease. To calculate the percent in which an item’s cost changes, use the following formulas. Percent of Increase. New amount – Original amount Original amount. Percent of Decrease. Original amount – New amount Original amount. - PowerPoint PPT Presentation

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Page 1: Percent of Change

Percent of ChangePercent Increase

Percent Decrease

Page 2: Percent of Change

To calculate the percent in which an item’s cost changes,

use the following formulas.

Page 3: Percent of Change

New amount – Original amount

Original amount100

Percent of Increase

Page 4: Percent of Change

Percent of Decrease

Original amount – New amount

Original amount100

Page 5: Percent of Change

The sale of Jetta sneakers fell from $3.5 million to $3 million. Find the percent decrease to the nearest whole percent.

3.5 3

3

.5

1003

16.6%

17%

Page 6: Percent of Change

The sale of Kids sneakers rose from $5 million to $5.6 million. Find the percent

increase to the nearest whole percent.

5.6 5

5

.6

1005

12%

Page 7: Percent of Change

Janet bought her new microwave at Rocklane’s while Matthew bought his at Stanville’s. Janet paid $300 while Matthew only paid $260 for the same model.

What is Matthew’s percentage of savings?

300 260

300

40

100300

13.3%

Page 8: Percent of Change

Lane bought a new microwave at Rocklane’s while Ginger bought her’s at Stanville’s. Lane paid $400 while Ginger only paid $330 for the same model.

What is Ginger’s percentage of savings?

400 330

400

70

100400

17.5%

Page 9: Percent of Change

The wholesale price for an item that regularly sells for $18.90 is $17.50. what is the

percentage markup for this item?

18.90 17.50

17.50

1.4

10017.50

8%

Page 10: Percent of Change

Find the percent of change, rounded to the nearest whole percent. Describe the change.

$5.65/h to $2.80/h.

5.65 2.80

5.65

2.85

1005.65

50.44%

Is this an increase or a decrease?

ADecrease

Round it off 50%


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