Unit 6 - Percents

6.1 - Fractions, Decimals, and Percents

100

Write 74% as a decimal.

0.74

200

Write 0.079 as a percent.

7.9%

300

Write 3/8 as a decimal and percent.

0.375 and 37.5%

6.2 The Percent Proportion

100

What percent of 60 is 18?

18/60=p/100

p = 30

200

40 is 125% of what number?

40/w=125/100

w=32

300

What number is 70% of 70?

a/70=70/100

a=49

6.4 - Percents of Increase and Decrease

100

Identify the percent of change as an increase or decrease. Then find the percent of change. Round to the nearest tenth of a percent if necessary.

6 yards to 36 yards

500% increase

200

Identify the percent of change as an increase or decrease. Then find the percent of change. Round to the nearest tenth of a percent if necessary.

120 meals to 52 meals

56.7% decrease

300

Identify the percent of change as an increase or decrease. Then find the percent of change. Round to the nearest tenth of a percent if necessary.

12 surfers to 9 surfers

25% decrease

6.5- - Discounts and Markups

100

Original Price - $50

Discount - 15%

Sale Price - ?

$42.50

200

Original Price - $93.75

Discount - 20%

Sale Price - ?

$75

300

Original Price - $50

Markup - 25%

Selling Price - ?

$62.50

6.6 - Simple Interest

100

An account earns simple interest. 

(a) Find the interest earned.

(b) Find the balance of the account.

$300 at 4% for 3 years

(a) $36

(b) $336

200

An account earns simple interest. 

(a) Find the interest earned.

(b) Find the balance of the account.

$2000 at 3.5% for 4 years

(a) $280

(b) $2280

300

Find the annual interest rate.

I = $17 ,  P = $500 , t = 2 years

1.7%