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 a percentage of a number?

Back

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

Front

What does it mean to increase a price by a certain percentage?

Back

Increasing a price by a certain percentage means adding that percentage of the original price to the original price. For example, a 20% increase on $100 means adding $20, resulting in a new price of $120.

Front

What does it mean to decrease a price by a certain percentage?

Back

Decreasing a price by a certain percentage means subtracting that percentage of the original price from the original price. For example, a 20% decrease on $100 means subtracting $20, resulting in a new price of $80.

Front

How do you find the original price if you know the sale price and the discount percentage?

Back

To find the original price, divide the sale price by (1 - discount rate). For example, if the sale price is $80 after a 20% discount, the original price is $80 / (1 - 0.20) = $100.

Front

What is a percent proportion?

Back

A percent proportion is an equation that shows two ratios are equal, often used to find a percentage. It is typically set up as part/whole = percent/100.

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How do you solve a percent proportion?

Back

To solve a percent proportion, cross-multiply and then divide to find the unknown value. For example, if 15 is what percent of 75, set it up as 15/75 = x/100, then cross-multiply and solve for x.

Front

What is depreciation in terms of value?

Back

Depreciation refers to the reduction in the value of an asset over time, often expressed as a percentage of the original value.

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How do you calculate the new value of an asset after depreciation?

Back

To calculate the new value after depreciation, subtract the depreciation amount from the original value. The depreciation amount is found by multiplying the original value by the depreciation rate.

Front

What is markup in pricing?

Back

Markup is the amount added to the cost price of goods to cover overhead and profit. It is often expressed as a percentage of the cost price.