Ratio and Rate Practice

A scientist use 786 milliliters of a liquid for an experiment. How many liters of the liquid did the scientist use for this experiment?

• 786,000 L

• 7.86 L

• 0.786 L

• 0.0786 L

The ratio of the number of boys to the number of girls in a choir is 5 to 4. If there are 60 girls is the choir, how many boys are in the choir?

• 75

• 61

• 48

• 80

The weight of one serving of trail mix is 2.5 ounces. How many servings are there in 22.5 ounces of trail mix?

• 11.5

• 25.0

• 56.25

• 9.0

A grocery store clerk put only packages of flour tortillas and packages of corn tortillas on a shelf. The ratio of the number of packages of corn tortillas to the total number of packages on the shelf was 7 to 16. Which number could be the number of packages of flour tortillas the clerk put on the shelf?

• 23

• 18

• 14

• 32

A housepainter mixed 5 gallons of blue paint with every 9 gallons of yellow paint in order to make a green paint. Which ratio of gallons of blue paint to gallons of yellow paint will make the same shade of green paint?

• 30 : 54

• 6 : 10

• 10 : 45

• 27 : 15

In Austin, Texas, 8 bats ate 40 grams of insects in one night. at this rate, how many grams of insects could 64 bats eat in one night?

• 320

• 5

• 20

• 240

Megan and Desmond each added the same amount of water to their aquariums. Megan mixed 5 mL of a chemical solution with every gallon of water for her aquarium. Desmond mixed 8 mL of the chemical solution with every 2 gallons of water for his aquarium. Which of these statements is true?

• Megan used more solution per gallon of water than Desmond, because 5 : 1 is greater than 8 : 2.

• Megan used more solution per gallon of water than Desmond, because 5 mL is greater than 2 mL.

• Desmond used more solution per gallon of water than Megan, because 8 mL is greater than 5 mL.

• Desmond used more solution per gallon of water than Megan, because 8 : 2 is greater than 5 : 1.

A robot's height is 1 meter and 20 centimeters. How tall is the robot in millimeters?

• 1,200 mL

• 1, 020 mL

• 120 mL

• Not here

A barrel contained 60 gallons of water. Water leaked out of the barrel at a rate of 5 gallons every 3 days. At this rate, how many days did it take for all 60 gallons of water to leak out of the barrel?

• 20 days

• 12 days

• 100 days

• 36 days