Pre-Algebra Ch. 7 Review

Convert Percents

100

Write 32% as a fraction in simplest form.

8/25

200

Write 13/20 as a percent.

65%

300

Write 0.045 as a percent.

4.5%

400

Write 0.25% as a decimal.

0.0025

500

Write 7/12 as a percent.

58.repeating 3%

Answer Percent Questions

100

What number is 45% of 180?

81

200

What percent of 140 is 28?

20%

300

15 is 60% of what number?

25

400

What percent of 72 is 252?

350%

500

What number is 0.5% of 3400?

17

Percent of Change

100

Find the percent of change.

Original: 40

New: 62

55% increase

200

Find the percent of change.

Original: 650

New: 806

24% increase

300

Find the percent of change.

Original: 92

New: 23

75% decrease

400

Find the percent of change.

Original: 248

New: 217

12.5% decrease

Markups and Discounts

100

Find the new price.

Wholesale price: $130

Markup percent: 80%

$234

200

Find the new price.

Wholesale price: $14

Markup percent: 120%

$30.80

300

Find the new price.

Original price: $24

Discount: 30%

$16.80

400

Find the new amount.

Food bill: $54.89

Sales tax: 6%

Tip: 20%

$69.16

500

Find the ORIGNIAL price.

Retail price: $24

Markup percent: 115%

$11.16

Interest

100

Find the SIMPLE INTEREST of the account.

P = $500, r = 7%, t = 4 years

$140

200

Find the ACCOUNT BALANCE for this account.

P = $2500, r = 3%, t = 9 month

$2556.25

300

Find the time for the following account.

A = $5000, P = $4000, r = 5%, t = ?

5 years

400

You deposit $700 into a savings account that earns 2% interest compounded annually. Find the balance of the account after 4 years.

$757.70

500

You deposit $1800 into a savings account that earns 2% interest compounded annually. Find the balance after 2 years.

$1872.72