Math Class: Episode 3. Ratios, Rates and Percents

Ratios and Rates

100

Write a ratio for the statement.

Nine slices of pizza for seven kids

9:7

200

Write two equivalent ratios for the statement.

Driving 400 miles in 6 hours.

200:3

200/3

300

Write the ratio and unit rate.

$14 for 3 cups of coffee

Ratio: 14:3

Unit Rate: $4.67 per cup

400

Find the unit rate.

36 books in 6 boxes

6 books per box

500

Find the ratio and unit rate.

42 mistakes on 3 tests.

Ratio: 42:3

Unit Rate: 14 mistakes per test.

Proportions and Scale

100

Is the relationship proportional?

1/2 = 1.5/3

yes

200

Write and solve a proportion for the situation.

7 chickens laid 35 eggs. How many eggs will be laid by 40 chickens?

7/35 = 40/x

7x=1400

x = 200 eggs

300

Is the relationship proportional?

20/16 = 10/8

yes

400

Find the value of x

6/x = 21/28

21x = 168

x = 8

500

A scale drawing of a park uses a scale factor of 

25 mm = 1 meter. How far apart are two lakes that are 150 millimeters apart on the map?

25/1 = 150/x

25x = 150

x = 6

Units of Measure

100

Convert 1,500 liters to kiloliters.

1.5 kL

200

Convert 75 pints to quarts.

37.5 qt.

300

Convert 500 centimeters to meters.

5 m

400

Which metric unit would you use to weigh a car?

kilogram

500

How many cups are in 3 quarts?

12 c

Percent of a Number

100

Write the following fraction as a percent

18/100 = _____%

4%

200

Write the following percent as a fraction.

82% = _____

41/50

300

Which is greater?

15% or 14/100

15%

400

Write the following fraction as a percent.

15/20 = _____%

75%

500

Find 35% of 60

21

Fractions, Decimals, and Percents

100

Convert 2/10 or 20% to a decimal.

0.2

200

Convert 7/8 to a percent.

87.5%

300

Convert 2/100 to a decimal.

0.02

400

Convert 65.5% to a fraction in simplest form.

131/200

500

Convert 92% to a fraction in simplest form.

1/25