Part, Whole, Percent Practice

Front

What is a percent?

Back

A percent is a way of expressing a number as a fraction of 100. It is often used to compare ratios and proportions.

Front

How do you calculate the whole from a part and a percent?

Back

To find the whole, divide the part by the percent (in decimal form). For example, if 70% of students went on a trip and 350 students attended, the whole is 350 ÷ 0.70 = 500.

Front

What is the formula to find a part when given the whole and a percent?

Back

Part = Whole × Percent (in decimal form). For example, if the whole is 32 desks and 25% are broken, Part = 32 × 0.25 = 8 desks.

Front

If 20% of a test time has passed and 16 minutes have been spent, how do you find the total test time?

Back

Total Test Time = Time Spent ÷ Percent (in decimal form). Here, Total Test Time = 16 ÷ 0.20 = 80 minutes.

Front

How do you find the total sales if a part represents a percent of the total?

Back

Total Sales = Part ÷ Percent (in decimal form). For example, if strawberries account for 35% of sales and $70 is made from them, Total Sales = 70 ÷ 0.35 = $200.

Front

What does it mean if 60% of guitars sold are electric?

Back

It means that electric guitars make up 60% of the total guitar sales. If 12 electric guitars were sold, the total sales can be calculated as Total = 12 ÷ 0.60 = 20 guitars.

Front

What is the relationship between part, whole, and percent?

Back

The relationship can be expressed as Part = Whole × Percent. This means the part is a fraction of the whole based on the percent.

Front

How do you convert a percent to a decimal?

Back

To convert a percent to a decimal, divide the percent by 100. For example, 25% becomes 0.25.

Front

What is the first step in solving a percent problem?

Back

Identify what the part, whole, and percent are in the problem.

Front

If 8 desks are broken out of 32, what percent of the desks are broken?

Back

Percent Broken = (Part ÷ Whole) × 100. Here, Percent Broken = (8 ÷ 32) × 100 = 25%.