Percentages

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8 Terms

1
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What is a percentage?

A percentage is a fraction expressed as a part of 100

2
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How do you convert a decimal to a percentage?

To convert a decimal to a percentage, multiply the decimal by 100. For example, 0.75 = 75%.

3
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How do you convert a percentage to a decimal?

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

4
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How do you convert a fraction to a percentage?

Multiply the fraction by 100 and add a % sign.

5
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How do you find 20% of a number?

Multiply the number by 0.20.

6
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What is the formula to calculate percentage increase?

(New price minus old price)/Old price x 100

7
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What is the formula to calculate percentage decrease?

(Old price minus new price)/Old price x 100

8
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How do you express a number as a percentage?

Divide the number by the total and multiply by 100.