How to Find Percent Using a Proportion

The video tutorial explains how to solve a standardized math test question using proportions. The problem involves calculating the percentage of the recommended daily amount of vitamin C Adriana consumed by drinking 2 and 1/4 cups of juice, given that 1/2 cup provides 30% of the daily amount. The solution involves setting up a proportion and solving it using the cross-product property, resulting in the conclusion that Adriana consumed 135% of her daily vitamin C requirement.

What information is given about the serving size of Adrianna's juice?

• One serving size equals 2 cups.

• One serving size equals 1 cup.

• One serving size equals 1/2 of a cup.

• One serving size equals 1/4 of a cup.

How much of the recommended daily amount of vitamin C is in one serving size?

• 40%

• 30%

• 20%

• 10%

What is the first step in setting up the proportion to solve the problem?

• Divide the serving size by the vitamin C percentage.

• Add the serving sizes together.

• Set up a ratio between serving size and vitamin C percentage.

• Multiply the serving size by 2.

What mathematical property is used to solve the proportion?

• Division property

• Subtraction property

• Cross-product property

• Addition property

What is the total percentage of the recommended daily amount of vitamin C that Adrianna consumed?

• 120%

• 150%

• 100%

• 135%