Ratio, Rates, and Proportions

What is a Ratio?

• Is a comparison of two quantities 

• A rate with a denominator of one

• It is when the only factor the numerator and denominator share is a one 

• Two decimals that can be multiplied

Simplify the ratio of
35 : 14

• 5 : 2

• 2 : 5

• 3 : 1

• 35: 14

Which is NOT equivalent to 3:5?

• 15:25

• 9:15

• 21:28

• 30:50

20 pencils

24 pencils

96 pencils

48 pencils

• 20 pencils

• 24 pencils

• 96 pencils

• 48 pencils

In an animal shelter, the ratio of dogs to cats is 4 to 3. If there are 72 dogs at the shelter, how many cats are there?

• 54 cats

• 18 cats

• 96 cats

• 16 cats

A Transformer stands 20 ft. tall with a shadow of 6 ft. long. If the Transformer next to it is 30 ft. tall, how long would its shadow be?

• 9 ft.

• 4 ft.

• 6 ft.

• 3 ft.

Are the two ratios proportional?
7:12 and 5 to 8

• Yes

• No

Are the two ratios proportional?
12/14 and 30:35

• Yes

• No

Will spent $3.75 for 3 pounds of granola. What is his unit rate in dollars per pound?

• $.50 per pound

• $1.25 per pound

• $3 per pound

• $2.50 per pound

A cashier at the grocery store rung up 2 customers in 8 minutes. At this rate, how many customers can he ring up in 30 minutes?

• 16 customers

• 10.5 customers

• 7.5 customers

• 14 customers