Ratios, Rates and Percents

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What is a ratio?

Back

A ratio is a comparison of two quantities, showing how many times one value contains or is contained within the other.

Tags

CCSS.6.RP.A.1

CCSS.6.RP.A.2

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What is a rate?

Back

A rate is a specific kind of ratio that compares two different units, such as miles per hour or price per item.

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CCSS.6.RP.A.1

CCSS.6.RP.A.2

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What is a percent?

Back

A percent is a way of expressing a number as a fraction of 100, often used to describe how much of something there is in relation to a whole.

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How do you calculate the percentage of tax paid?

Back

To calculate the percentage of tax paid, use the formula: (Tax Amount / Original Price) x 100.

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How do you find the percentage decrease in price?

Back

To find the percentage decrease, use the formula: ((Original Price - New Price) / Original Price) x 100.

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CCSS.6.RP.A.3C

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What is the formula to calculate a tip?

Back

To calculate a tip, multiply the total bill by the tip percentage (as a decimal). For example, for a 25% tip on a $30 meal: $30 x 0.25 = $7.50.

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CCSS.6.RP.A.3C

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How do you calculate depreciation?

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To calculate depreciation, multiply the original value by the depreciation rate. For example, for a $45,000 car depreciating at 12%: $45,000 x 0.12 = $5,400.

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CCSS.6.RP.A.3C

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What is the final price after a markdown?

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To find the final price after a markdown, subtract the markdown amount from the original price. For example, for a $12 item marked down by 30%: $12 - ($12 x 0.30) = $8.40.

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CCSS.6.RP.A.3C

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What is the difference between a ratio and a rate?

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A ratio compares two quantities of the same kind, while a rate compares two quantities of different kinds.

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CCSS.6.RP.A.3A

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How do you convert a fraction to a percent?

Back

To convert a fraction to a percent, divide the numerator by the denominator and multiply by 100.