Review 7.3-1 Ratios & Proportions

Review 7.3-1 Ratios & Proportions

Topics in this Review:

1. Ratios

2. Proportions

3. Ratio Tables

Ratios

A comparison of 2 or more values.

Can be written in 3 ways:

a/b a to b a:b

Should always be written in simplest form!

Multiple Choice

Ella has 5 balloons. Taylor has 7 balloons. Write the ratio of Ella's balloons to Taylor's balloons.

• 7:5
• 5:7
• 3:5
• 5:3

Multiple Choice

The cookie jar has six chocolate chip cookies and five oatmeal cookies. What is the ratio of oatmeal to chocolate chip cookies?

• 6:5
• 5:6
• 6:11
• 6:11

Multiple Choice

Express the ratio as a fraction in simplest form:
18 ounces to 3 cups

• 6 to 1
• 1/6
• 18/3
• 3/18

Multiple Choice

The Northwestern huskies had a record of 25 wins and 45 losses.  What was the ratio of wins to losses?

• 9:5
• 5:9
• 5:3
• 3:5

Multiple Choice

Patrick has 2 black, 3 red, and 5   white toy cars. What is the ratio of red toy cars to all the toy cars? 

• 3:5
• 1:3
• 3:11
• 3:10

Proportions

Two ratios that are equal are proportional

To check if two ratios are proportional: cross multiply!

Multiple Choice

Do the ratios form a proportion?

• Yes, they form a proportion.
• No, they do not form a proportion.

Multiple Choice

Determine if the ratios are proportional.
4/5 and 15/20

• Yes
• No

Multiple Choice

Write if the given proportion is 'True' or 'False':
8 : 9 = 24 : 18

• TRUE
• FALSE
• dont know
• none of these

Multiple Choice

Do the ratios form a proportion?

 $\frac{12}{18}\ and\ \frac{42}{63}$  

• Yes, they form a proportion.

• No, they do not form a proportion.

Multiple Choice

Which is equivalent to ?

 $\frac{5}{6}$  

•  $\frac{15}{24}$  

•  $\frac{20}{24}$  

•  $\frac{1}{6}$  
  

•  $\frac{25}{35}$  
  

Multiple Choice

Which is NOT equivalent to 3:5?

• 15:25
• 9:15
• 21:28
• 30:50

Multiple Choice

If Mike has a ratio of 2 apples to 3 bananas, how many apples would you expect him to have if he has 15 bananas?

• 7
• 9
• 10
• 2

Ratio Tables

• Watch the following video: https://youtu.be/vBAhhrgwP0k

Multiple Choice

Is the ratio table proportional?

• Yes, proportional

• No, not proportional

Multiple Choice

Is the ratio table proportional?

• Yes, proportional

• No, not proportional

Fill in the Blank

What is the missing number in the ratio table ?

Multiple Choice

What is the missing number in the ratio table?

• 21
• 24
• 27
• 25