Front

What is a percentage?

Back

A percentage is a way of expressing a number as a fraction of 100. It is often used to compare relative sizes or to express how much of something there is in relation to a whole.

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How do you calculate a percentage of a number?

Back

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

Tags

CCSS.6.RP.A.3C

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What does it mean to find the original price after a discount?

Back

Finding the original price after a discount involves determining the price before the discount was applied. This can be calculated by dividing the amount saved by the discount rate (as a decimal) and adding that to the sale price.

Tags

CCSS.6.RP.A.3C

Front

How do you find the total number of items when given a percentage?

Back

To find the total number of items when given a percentage, divide the number of items that represent the percentage by the percentage (expressed as a decimal). For example, if 12% of the total is 9, then total = 9 / 0.12 = 75.

Tags

CCSS.6.RP.A.3C

Front

What is the formula for calculating the percentage increase or decrease?

Back

The formula for calculating percentage increase is: ((new value - old value) / old value) * 100. For percentage decrease, it is: ((old value - new value) / old value) * 100.

Tags

CCSS.6.RP.A.3C

Front

What is a proportion?

Back

A proportion is an equation that states that two ratios are equal. It can be used to solve problems involving percentages by setting up a relationship between the part and the whole.

Tags

CCSS.7.RP.A.2C

Front

How do you convert a percentage to a decimal?

Back

To convert a percentage to a decimal, divide the percentage by 100. For example, 25% as a decimal is 25 / 100 = 0.25.

Front

What is the relationship between a part and a whole in percentage problems?

Back

In percentage problems, the part represents the portion of the whole that is being considered, while the whole is the total amount from which the part is derived.

Front

How can you estimate the original price from a discount?

Back

To estimate the original price from a discount, you can use the formula: Original Price = Amount Saved / Discount Rate. For example, if $40 was saved at a 19% discount, the original price is approximately $200.

Tags

CCSS.7.RP.A.3

Front

What does it mean for a number to be a certain percentage of another number?

Back

When a number is a certain percentage of another number, it means that the first number represents that fraction of the second number. For example, if 12 is 30% of a number, it means that 12 is 30 out of every 100 parts of that number.