Ratio & Proportions Aptitude

Solve the proportion: 3/5 = x/15

• 5

• 9

• 10

• 12

Convert the ratio 4:7 to a fraction.

• 5/7

• 4/7

• 3/7

• 2/7

Find an equivalent ratio to 2:3 with a total of 25 parts.

• 8:12

• 10:15

• 5:8

• 15:20

How would you apply ratios to determine the ingredients needed for a recipe that serves 6 people when the original recipe serves 4 people?

• Divide the original recipe by 6 to determine the ingredients needed for a recipe that serves 4 people.

• Calculate the ratio of 6 to 4 (6/4 = 1.5) and multiply each ingredient quantity in the original recipe by 1.5 to determine the ingredients needed for a recipe that serves 6 people.

• Use a completely different recipe for 6 people instead of adjusting the original recipe.

• Add the quantities of ingredients in the original recipe to determine the ingredients needed for a recipe that serves 6 people.

Use cross-multiplication to solve the proportion: 8/12 = x/18

• 6

• 10

• 15

• 12

If the ratio of boys to girls in a class is 3:5, and there are 24 students in total, how many boys are there?

• 12

• 9

• 15

• 18

Express the ratio 5:9 as a fraction in simplest form.

• 45

• 5:9

• 2.5

• 5/9

• 9/5

Determine an equivalent ratio to 3:4 with a total of 35 parts.

• 7:9

• 5:7

• 9:12

• 6:8

In a bag of marbles, the ratio of red marbles to blue marbles is 2:5. If there are 35 blue marbles, how many red marbles are there?

• 25

• 15

• 10

• 20

A recipe calls for 2 cups of flour for every 3 cups of sugar. How much flour is needed if you use 9 cups of sugar?

• 10 cups

• 6 cups

• 8 cups

• 4 cups