percentages' increase and decrease

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10 Terms

1
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Percentage Increase Calculation

To calculate a percentage increase, use the formula: Original Number × (1 + Percentage as Decimal).

2
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Percentage Decrease Calculation

To calculate a percentage decrease, use the formula: Original Number × (1 - Percentage as Decimal).

3
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Multiplier Method

A method to simplify percentage changes by using 1 plus/minus the decimal form of the percentage.

4
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Decimal Technique

Convert the percentage to a decimal by dividing by 100, then multiply by the original number.

5
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Special Cases for Percentage Changes

Handle changes less than 10% carefully by ensuring the correct conversion to decimals.

6
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Handling Changes Over 100%

For changes over 100%, convert the percentage to a decimal greater than 1 before calculating.

7
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3% as Decimal

3% becomes 0.03 when converted to decimal.

8
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40% Multiplier

A 40% increase corresponds to a multiplier of 1.4.

9
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30% Multiplier for Increase

A 30% increase corresponds to a multiplier of 1.3.

10
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30% Multiplier for Decrease

A 30% decrease corresponds to a multiplier of 0.7.