Ratio Relationships

In the table, the ratio of y to x is constant.

What is the value of the missing number?

• 15

• 20

• 25

• 30

There are 4 trucks for every 5 cars in a parking lot. How many trucks and cars could be in the parking lot?

• 64 trucks and 80 cars

• 72 trucks and 73 cars

• 84 trucks and 100 cars

• 96 trucks and 110 cars

Seventy-five 6th-grade students chose to watch a movie on the last day of school. This is 25% of the 6th-grade class. How many total students are in the 6th grade?

• 100

• 200

• 300

• 400

A restaurant orders corn tortillas and flour tortillas. The ratio of the number of corn tortillas to the number of flour tortillas is 2 : 3. What is the ratio of the number of flour tortillas to the total number of tortillas?

• 3 : 8

• 3 : 5

• 2 : 8

• 2 : 5

• A

• B

• C

• D

The format we use to write an equation with unit rate (k)

• y = k/x

• y = kx

• k = y/x

• k = xy

Ashley biked 32 miles in 2 hours. Mike biked 36 miles in 3 hours. How much farther can Ashley bike than Mike in 5 hours if they both continue at the same rate?

• 80

• 60

• 40

• 20

If the ratio of cats to dogs is 3:4, how many cats are there if there are 20 dogs?

• 15 cats

• 25 cats

• 30 cats

• 10 cats

The formula for calculating the unit rate (k).

• x = yk

• y = kx

• k = yx

• k = y/x

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