Mastering Ratios and Proportions

A recipe requires a ratio of 2 cups of flour to 3 cups of sugar. If you use 4 cups of flour, how many cups of sugar do you need?

• 5 cups

• 6 cups

• 8 cups

• 9 cups

• All of the above

If the ratio of cats to dogs in a shelter is 5:7, how many cats are there if there are 21 dogs?

• 10 cats

• 15 cats

• 20 cats

• 25 cats

Convert the ratio 8:12 to its simplest form.

• 2:3

• 3:4

• 4:5

• 1:2

A car travels 150 miles using 5 gallons of gas. What is the car's fuel efficiency in miles per gallon?

• 20 miles per gallon

• 25 miles per gallon

• 30 miles per gallon

• 35 miles per gallon

• They are equal

• Cannot be determined

If the ratio of boys to girls in a class is 4:5 and there are 20 boys, how many girls are there?

• 15 girls

• 25 girls

• 30 girls

• 35 girls

Convert the ratio 14:21 to a fraction in simplest form.

A bag contains red and blue marbles in the ratio 3:2. If there are 18 red marbles, how many blue marbles are there?

• 9 blue marbles

• 12 blue marbles

• 15 blue marbles

• 18 blue marbles

Which of the following ratios is equivalent to 10:15?

• 2:3

• 3:5

• 4:6

• 5:8