Unit 7 Review Pt. 2

7.5 Percent of Change

100

Identify the Percent of Change

Original: 30

New: 45

50% increase

200

Find percent of change:

Original: 28

New: 7

75% decrease

300

Increase 25 by 24%

31

400

Decrease 72 by 65%

25.2

500

An investor buys a stock for $24. 3 years later, the stock has increased by 15%. How much is the stock worth?

$27.60

7.6 Percent Applications

100

Find the new amount:

Wholesale Price: $13

Markup Percent: 110%

$27.30

200

Find the new amount:

Original: $60

Discount Percent: 20%

$48

300

Find the total cost:

Food Bill: $18

Sales Tax: 5%

Tip: 20%

$22.68

400

Find original price:

Sale Price: $24

Markup Percentage: 115%

$11.16

500

Find the original price.

Sale Price: $210

Discount Percent: 30%

$300

7.7 Simple and Compound Interest

100

Find Simple Interest and total accumulated:

P = $500

r=7%

t=4 years

$140, $640

200

Find the rate of the simple interest

A=$563

P=$500

t=7years

r=1.8%

300

Calculate the simple interest and account balance:

P=$1250

r=4%

t=10 years

$500, $1750

400

Find the balance for an account earning compound interest:

P=$800

r=5%

t=3 years

$926.10

500

Find the balance of an account earning compound interest:

P=$2200

r=7%

t=8years

$3780.01

7.4 Percent Equation

100

What number is 60% of 25

15

200

What 18 is 36% of what number?

50

300

What number is 20% of 45

9

400

What percent of 80 is 121?

265%

500

What percent of 90 is 72?

80%