Ratios, Unit Rate, and Proportions

Ratios

100

Write 6 girls to 8 boys as a ratio in 3 ways.

6/8, 6 to 8, 6:8

200

Write 10 limes to 6 lemons as a ratio in 3 ways.

10:6, 10/6, 10 to 6

300

What are the 3 ways we write a ratio.

As a fraction, with a colon, and with the word "to"

400

A comparison between two numbers is called a______

ratio

500

What is a unit rate?

a rate with 1 as the denominator ( per one)

Unit Rate

100

If Mimi drives 50 miles in 2 hours, what is her rate (speed per hour)?

What is 25 miles per hour

200

If James types 120 words per 3 minutes, what is his rate of typing?

What is 40 words per minute

300

If 10 bags of Hot Cheetos cost $3.50, then how much does 1 cost?

What is $0.35

400

Which is the better deal $22 for 5 t-shirts or $28 for 8 t-shirts

What is $28 for 8 t-shirts (rate of $3.5 per shirt)

500

Which is the better deal? 5 calculators for $105 or 24 calculators for $552

5 for 105

Proportional or Not?

100

2/3 and 4/6

Yes, proportional, 2 x 6 = 12, 3 x 4 = 12

200

Are 1/6 and 2/7 proportional?

Not Proportional, 1 x 7 = 7 and 2 x 6 = 12

300

Are 6/8 and 9/12 proportional?

Yes proportional, 6 x 12 = 72, and 9 x 8 = 72

400

Are 5/10 and 4/8 proportional?

Yes proportional, 5 x 8 = 40, 10 x 4 = 40

500

12/20 and 3/10

Not proportional, 12 x 10 = 120, 20 x 3 = 60

Solving Proportions

100

Solve for x. x/6 = 2/12

What is 1

200

Solve for x. x/2 = 9/6

What is 3

300

Solve for x. x/6 = 8/15

What is 3.2

400

Solve for x. 6/10 = 18/x

What is 30

500

Solve for x. 3/8 = 15/x

What is 40.

Percent of a Number

100

What is 10 percent of 20?

2

200

What is 20 percent of 40?

8

300

Find 15 percent of 60

9

400

Henry scored an 18 out of 20 on his test.What was his percent of out 100?

90

500

35 is 20 percent of what number?

175