Percents Review

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What is a percent?

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A percent is a way to express a number as a fraction of 100. It is denoted by the symbol '%'. For example, 50% means 50 out of 100.

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How do you calculate the sales tax on an item?

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To calculate sales tax, multiply the price of the item by the sales tax rate (as a decimal). For example, for a $60 item with a 5% tax, the sales tax is $60 x 0.05 = $3.

Tags

CCSS.6.RP.A.3B

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What is the formula to calculate a percentage of a number?

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The formula to calculate a percentage of a number is: (Percentage / 100) x Total Amount. For example, to find 20% of $50, calculate (20/100) x 50 = $10.

Tags

CCSS.6.RP.A.3C

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How do you find the total cost including tax?

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To find the total cost including tax, add the sales tax to the original price. For example, if an item costs $60 and the tax is $3, the total cost is $60 + $3 = $63.

Tags

CCSS.6.RP.A.3C

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What is a tip and how is it calculated?

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A tip is a small amount of money given to service workers for their service. It is usually calculated as a percentage of the total bill. For example, a 20% tip on a $65 meal is $65 x 0.20 = $13.

Tags

CCSS.6.RP.A.3C

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How do you calculate the percentage of questions answered incorrectly?

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To calculate the percentage of questions answered incorrectly, divide the number of incorrect answers by the total number of questions, then multiply by 100. For example, 22 incorrect out of 40 questions is (22/40) x 100 = 55%.

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What does it mean to find a percentage increase?

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A percentage increase shows how much a value has grown compared to its original amount. It is calculated by: ((New Value - Original Value) / Original Value) x 100.

Tags

CCSS.6.RP.A.3C

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What does it mean to find a percentage decrease?

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A percentage decrease shows how much a value has shrunk compared to its original amount. It is calculated by: ((Original Value - New Value) / Original Value) x 100.

Tags

CCSS.6.RP.A.3C

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How do you convert a fraction to a percent?

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To convert a fraction to a percent, divide the numerator by the denominator and then multiply by 100. For example, 1/4 = (1 ÷ 4) x 100 = 25%.

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What is the relationship between fractions, decimals, and percents?

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Fractions, decimals, and percents are different ways to represent the same value. For example, 1/2 = 0.5 = 50%.