Ratios and Rates Review

José is using 12 brown tiles and 8 white tiles to design a section of an outdoor patio. Which ratio compares the number of brown tiles to the total number of tiles in one section?

• 12 : 8

• 8 : 12

• 12 : 20

• 8 : 20

The table shows the party affiliation of the 100 senators of the 109th Congress. The ratio of Republicans to Democrats is 5 : 4. How many senators are Democrats? Independents?

• Democrats: 40, Independents: 5

• Democrats: 45, Independents: 0

• Democrats: 44, Independents: 1

• Democrats: 50, Independents: 0

An animal shelter with only dogs and cats has a ratio of cats to dogs that is 9 : 7. What is the ratio of dogs to all animals?

• The ratio of dogs to all animals is 7 : 16.

• The ratio of dogs to all animals is 7 : 18.

• The ratio of dogs to all animals is 7 : 14.

• The ratio of dogs to all animals is 7 : 20.

Complete the ratio table. Then plot the pairs on the coordinate plane. What is the missing value in the ratio table?

• 6

• 7

• 8

• 10

An intersection starts getting traffic at 8:00 AM, and then closes for construction from 1:00 PM to 2:00 PM. While the intersection is open, cars pass through at a rate of 32 cars each hour. How many cars pass through the intersection between 8:00 AM and 5:00 PM?

• 256 cars

• 240 cars

• 320 cars

• 128 cars

Jessica is buying several bunches of bananas to make desserts for a fundraiser. She can buy 10 pounds of bananas for $14.90 or 8 pounds for $12.08. Which is the better buy?

• 10 pounds

• 8 pounds

Last week, Leah worked 25 hours on weekdays and 11 hours on the weekend. Which ratio compares the number of hours Leah worked on weekdays to the total number of hours she worked?

• A. 25 : 11

• B. 11 : 25

• C. 25 : 36

• D. 36 : 25

A varsity boys’ basketball team has a ratio of seniors to juniors that is 7 : 4. If the team is made up only of juniors and seniors, what is the ratio of juniors to seniors?

• 4:7

• 7:4

• 4:3

• 3:4

Lela is buying spools of yarn for a knitting class. She can buy a 40-yard spool for $15.60 or a 60-yard spool for $19.20. Which is the better buy?

• 40-yard spool

• 60-yard spool