Percents and Percent Proportions

Front

What is a percent?

Back

A percent is a ratio expressed as a fraction of 100. It represents a part of a whole.

Front

How do you calculate the percent of a number?

Back

To calculate the percent of a number, multiply the number by the percent (in decimal form). For example, to find 20% of 50, calculate 50 * 0.20 = 10.

Front

What is a markup?

Back

A markup is the amount added to the cost price of a product to determine its selling price.

Front

How do you find the cost price if you know the selling price and markup percentage?

Back

Cost Price = Selling Price / (1 + Markup Percentage). For example, if the selling price is $80 and the markup is 25%, Cost Price = 80 / 1.25 = $64.

Front

What is a percent proportion?

Back

A percent proportion is an equation that shows two ratios are equal, often used to find a part, whole, or percent.

Front

How do you solve a percent proportion?

Back

To solve a percent proportion, set up the equation as part/whole = percent/100 and cross-multiply to find the unknown.

Front

If 8 is 40% of what number, how do you find that number?

Back

Set up the equation: 8 = 0.40 * x. Solve for x by dividing both sides by 0.40, giving x = 20.

Front

What is the formula to find the original price after a markup?

Back

Original Price = Selling Price / (1 + Markup Percentage). For example, if a laptop sells for $1200 after a 20% markup, Original Price = 1200 / 1.20 = $1000.

Front

How do you calculate the number of correct answers from a percentage score?

Back

To find the number of correct answers, multiply the total number of questions by the percentage (in decimal form). For example, 80% of 50 questions = 50 * 0.80 = 40.

Front

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

Back

The relationship can be expressed as: Percent = (Part / Whole) * 100.