Unit 6 Review

Express as a percent...

0.06

6%

Express as a percent...

5.49

549%

Express as a decimal…

2.25%

0.0225

Express as a percent...

2325

23 = x 25 100

92%

Solve using the percent equation…

35 is what percent of 50?

35 = (n) 5050 50

n = .7

Final answer…70%

Brittney spent $300 dollars on eight new sweaters. How much did she spend per sweater?

$37.50

If you wanted to earn $200 in interest over 5 years with an interest rate of 4%, how much money would you have to invest?

I = prt

I = prt

200 = p (.04) (5)200 = p (.2)

.2 .2

p = $1,000

Tracy used to jog 16 miles per week. Now she only has time to jog 6 miles per week. What is the percent of change?

-62.5%

If the length of the side of a square is increased from 4 to 8, which of the following statements is true?

A. Both the area and perimeter are doubledB. Both the area and perimeter are quadrupledC. The perimeter is doubled and the area is quadrupled. D. The perimeter is quadrupled and the area is doubled.

C

2.5 units

7.5 units

Area = 30 units2

Rectangle I

Rectangle II

The two rectangles below are similar…

What is the area of Rectangle II?

270 units2

The scale on a map is ¼ inch = 100 miles. The distance on a map from Dallas, TX to New York City is 5 inches. How far is the actual distance?

Map .25 = 5Actual 100 X

2,000 miles

Find the scale factor for 6 inches = 5 feet.

Scale factor must be in the same units!

6 inches60 inches

1 : 10

A model of an airplane is 10 inches in length. The actual length of the airplane is 150 feet. What is the scale used to build the model?

1 inch = ? feet

Scale:

1 inch = 15 feet

Jared can eat 11 gummy bears in 6 minutes. How many can he eat in 3 hours?

Word ratio: gummy bears minutes

11 = x 6 180

330 gummy bears

Sharon earns a salary of $425 per week plus an additional 5% commission on her sales. How much will she earn this week if her sales are $3,500?

$3,500 x .05 = $175

$425 + $175 = $600

Timmy made a scale drawing of a room. The drawing has a length of 4 inches and a width of 3 inches. The actual room has a width of 72 feet. What is the length, in feet, of the actual room?

Word Ratio drawing actual

length 4 x

width 3 72

96 feet