MJ2A – Ch 6 Study GuideMJ2A – Ch 6 Study GuideRatios &

Rates

Scale Drawings &

ModelsProportions

Fractions, Decimals &

Percents

Percent Proportion

Percent of Change

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400

500

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Ratio & Rates 100

Answer: 3/11

9 Students out of 33 students

Express as a fraction in simplest form

Ratio & Rates 200

Answer: 3/4

12 hits out of 16 times at bat

Express as a fraction in simplest form

Ratio & Rates 300

Answer: 5/3

30 hours to 18 hours

Express as a fraction in simplest form

Ratio & Rates 400

Answer: 1/4

5 quarts to 5 gallons

Express as a fraction in simplest form

Ratio & Rates 500

Answer: 5/24

10 inches to 4 feet

Express as a fraction in simplest form

Scale Drawing & Models 100

Answer: 40

On a map of Florida the scale is 1in = 20 mi.

If the distance between Tampa and St. Petersburg is 2 inches, how many miles is

that?

Scale Drawing & Models 200

Answer: 92.8 ft

A model airplane is built using a 1:16 scale. On the model, the length of the wing span is 5.8 feet. What is the actual length

of the wing?

Scale Drawing & Models 300

Answer: 51 feet

A builder is designing a swimming pool that is 8.5

inches on the scale drawing. If the scale is 1in = 6ft what is the

actual length of the pool?

Scale Drawing & Models 400

Answer: 1/48

A set of landscape plans shows a flower bed that is 6.5 inches wide. The scale on the plan is 1 in = 4 ft

What is the scale factor?

Scale Drawing & Models 500

Answer: 1in = 4 ft

A man in a photograph is 1.5 inches in height. If the man is 6 ft tall, what is the

scale?

DailyDouble!

Proportions 100

Answer: Yes

Determine if the pair of ratios form a proportion:

5.3 2.7

15.9 8.1,

Proportions 200

Answer: x = 1.4

Solve the proportion:

7 x

45 9=

Proportions 300

Answer: a = 0.8

Solve the proportion:

a 4

0.28 1.4=

Proportions 400

Answer: 5 boxes

Solve the proportion:

8 pencils in 2 boxes

20 pencils in x boxes

Proportions 500

Answer: y = $25.20

Solve the proportion:

y dollars for 5.4 gallons

14 dollars for 3 gallons

Fractions, Decimals & Percents 100

Answer: 9/20

Express as a fraction in simplest form

45%

Fractions, Decimals & Percents 200

Answer: 1/200

Express as a fraction in simplest form

0.5%

Fractions, Decimals & Percents 300

Answer: 62.5%

Express the fraction as a percent

5

8

Fractions, Decimals & Percents 400

Answer: 0.08%

Express the decimal as a percent.

0.0008

Fractions, Decimals & Percents 500

Answer: 0.125

Express the percent as a decimal

12 ½ %

Percents Proportion 100

Answer: 45%

72 is what percent of 160?

Percents Proportion 200

Answer: 50

36 is 72% of what number?

Percents Proportion 300

Answer: 126

What is 84% of 150?

Percents Proportion 400

Answer: 112

14 is 12½ % of what number?

Answer: 411.4

Percents Proportion 500

36 is 8¾% of what number?

Percent of Change 100

Answer: 29.7% decrease

Find the percent of change from $9.25 to $6.50. State if

increase or decrease

Percent of Change 200

Find the percent of change from 75 minutes to 100 minutes. State if

increase or decrease

Answer: 33.3% Increase

Percent of Change 300

Answer: 600% Increase

Find the percent of change from 15 songs to 105 songs. State if increase or decrease

Percent of Change 400

Answer: 5.5 years

Using the formula I=prt, determine how long it would take to earn $495 interest on $2,000 invested at a rate of

4.5%

Percent of Change 500

Answer: 4.75%

Using the formula I=prt, determine the interest rate on

$1600 invested for 6 years which earned $456 in interest