Ratio, Proportions, and Percents

Ratios-Rates

100

Simplify the ratio 15:35

3:7

200

Are the ratios 10:12 and 2:3 equal?

No

300

Find the unit rate: $42 hours for 3 hours of work

$14:1 hour

400

Find the unit rate: 30 sit-ups in two minutes

15 sit-ups:1 minutes

500

Find the unit price: $1.83 ounces for 3 ounces

$0.61:1 ounce

Proportions

100

Write the cross products for 10/20 and 20/40

400 = 400

200

Write the cross products for 8/12 and 24/36

288 = 288

300

Solve each proportion 1:2 = n:4

N=2

400

Solve the proportion: 5:n = 25:30

N=6

500

Solve the proportion: 12:14 = 36:n

N=42

Fractions-Decimals-%

100

Convert to a percent: 7/8

87.5%

200

Convert to a percent: 5/6

83.3%

300

Convert to a decimal: 87%

.87

400

Convert to a decimal: 98.76%

.9876

500

Convert to a decimal: 115.5%

1.155

Part-Number-Whole

100

What is 25% opf 500?

125

200

What is 45% of 1000?

450

300

What percent of 150 is 50?

33.3%

400

What percent of 160 is 60?

37.5%

500

75% of what number is 75?

100

% Increase/Decrease

100

Find the sales tax:

Video Game $55

Sales Tax: 7%

$3.85

200

Find the sales tax

Water Buffalo: $40,000

Sales Tax: 20%

$8000

300

Find the Discount

UFO: $1,000,000,000

50% off!

$500,000,000

400

Find the tip:

Meal $146

Tip:18%

$26.28

500

What is the new price?

JTJS Sock: $15

Tax: 7%

$16.05