Equivalent Ratios and Comparing Ratios

Last week 90 vehicles came to the school car wash. Of those vehicles, 1 out of every 10 were trucks and the rest were cars. How many cars came to the school car wash last week?

• 81

• 26

• 72

• 54

This week, 100 vehicles came to the school car wash. Of those vehicles, 3 out of every 4 were cars and the rest were trucks. How many trucks came to the school car wash this week?

• 75

• 50

• 25

• 3

Gina makes a large batch of macaroni and cheese. Her recipe calls for 1 cup of white cheddar for every 3 cups of sharp cheddar. If she uses 8 cups of cheese in all, how many cups of sharp cheddar does she use?

• 8

• 10

• 4

• 6

Derek buys a box of 30 granola bars. The box contains both cranberry bars and raisin bars. The ratio of cranberry bars to raisin bars is 1 to 4. How many of the granola bars in the box are raisin?

• 25

• 24

• 30

• 18

Cheri's school colors are green and yellow. She has to mix 1 ounce of blue paint with 5 ounces of yellow paint to get the correct shade of green. How many ounces of yellow paint does she need to make 36 ounces of green paint?

• 36

• 6

• 30

• 12

Jason's school colors are purple and red. He has to mix 2 ounces of blue paint with 1 ounce of red paint to get the correct shade of purple. How many ounces of red paint does he need to make 60 ounces of purple paint?

• 20

• 15

• 30

• 40

For a science experiment, John adds 3 tsp of salt to 10 tsp of water. Mary adds 5 tsp of salt to 12 tsp of water. Whose water is saltier?

• John

• Mary

• They are the same.

Trey and George are competing in a basketball free throw competition. Trey's ratio of free throws made to free throws missed is 6 to 9. George's ratio of free throws made to free throws missed is 12 to 18. Who has the better ratio for making free throws?

• Trey

• George

• They are the same.

A store sells two types of cleaning solutions. Brand A has 5 mL of white vinegar for every 25 mL of water. Brand B has 30 mL of white vinegar for every 125 mL of water. Which mixture has a higher concentration of vinegar?

• Brand A

• Brand B

• They are the same.