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2.7 – Percent of Change. Percent Change: Change = x _ Original 100.

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Presentation on theme: "2.7 – Percent of Change. Percent Change: Change = x _ Original 100."— Presentation transcript:

1 2.7 – Percent of Change

2 Percent Change: Change = x _ Original 100

3 Percent Change: Change = x _ Original 100 Ex. 1 Determine whether each percent of change is a percent of increase or decrease. Then find the percent of change. a) Original: 20 New: 23

4 Ex. 1 Determine whether each percent of change is a percent of increase or decrease. Then find the percent of change. a) Original: 20 New: 23 Change = x _ Original 100

5 Ex. 1 Determine whether each percent of change is a percent of increase or decrease. Then find the percent of change. a) Original: 20 New: 23 Change = x _ Original = x _

6 Ex. 1 Determine whether each percent of change is a percent of increase or decrease. Then find the percent of change. a) Original: 20 New: 23 Change = x _ Original = x _

7 Ex. 1 Determine whether each percent of change is a percent of increase or decrease. Then find the percent of change. a) Original: 20 New: 23 Change = x _ Original = x _ x =

8 Ex. 1 Determine whether each percent of change is a percent of increase or decrease. Then find the percent of change. a) Original: 20 New: 23 Change = x _ Original = x _ x = 300

9 Ex. 1 Determine whether each percent of change is a percent of increase or decrease. Then find the percent of change. a) Original: 20 New: 23 Change = x _ Original = x _ x =

10 Ex. 1 Determine whether each percent of change is a percent of increase or decrease. Then find the percent of change. a) Original: 20 New: 23 Change = x _ Original = x _ x = x = 15; New greater than Orig., so INC

11 Ex. 1 Determine whether each percent of change is a percent of increase or decrease. Then find the percent of change. a) Original: 25 New: 17

12 Ex. 1 Determine whether each percent of change is a percent of increase or decrease. Then find the percent of change. a) Original: 25 New: 17 Change = x _ Original = x _ x = x = 32; New less than Orig., so DEC

13 Ex. 2 Marta is purchasing wire and beads to make jewelry. Her merchandise is $ If the tax is 7.25%, what is the total cost?

14 Total Cost = Price + Tax of Price

15 Ex. 2 Marta is purchasing wire and beads to make jewelry. Her merchandise is $ If the tax is 7.25%, what is the total cost? Total Cost = Price + Tax of Price T = $ %($28.62)

16 Ex. 2 Marta is purchasing wire and beads to make jewelry. Her merchandise is $ If the tax is 7.25%, what is the total cost? Total Cost = Price + Tax of Price T = $ %($28.62) T = (28.62)

17 Ex. 2 Marta is purchasing wire and beads to make jewelry. Her merchandise is $ If the tax is 7.25%, what is the total cost? Total Cost = Price + Tax of Price T = $ %($28.62) T = (28.62) T =

18 Ex. 2 Marta is purchasing wire and beads to make jewelry. Her merchandise is $ If the tax is 7.25%, what is the total cost? Total Cost = Price + Tax of Price T = $ %($28.62) T = (28.62) T = T =

19 Ex. 2 Marta is purchasing wire and beads to make jewelry. Her merchandise is $ If the tax is 7.25%, what is the total cost? Total Cost = Price + Tax of Price T = $ %($28.62) T = (28.62) T = T = T = $30.69

20 Ex. 3 Marta is purchasing a pair of jeans. The jeans cost $85. If they are on sale for 20% off, what is the total cost?

21 Total Cost = Price – Discount of Price

22 Ex. 3 Marta is purchasing a pair of jeans. The jeans cost $85. If they are on sale for 20% off, what is the total cost? Total Cost = Price – Discount of Price T = $85 – 20%($85) T = 85 – 0.2(85) T = 85 – 17 T = 68 T = $68


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