percentages' increase and decrease
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10 Terms
Percentage Increase Calculation
To calculate a percentage increase, use the formula: Original Number × (1 + Percentage as Decimal).
Percentage Decrease Calculation
To calculate a percentage decrease, use the formula: Original Number × (1 - Percentage as Decimal).
Multiplier Method
A method to simplify percentage changes by using 1 plus/minus the decimal form of the percentage.
Decimal Technique
Convert the percentage to a decimal by dividing by 100, then multiply by the original number.
Special Cases for Percentage Changes
Handle changes less than 10% carefully by ensuring the correct conversion to decimals.
Handling Changes Over 100%
For changes over 100%, convert the percentage to a decimal greater than 1 before calculating.
3% as Decimal
3% becomes 0.03 when converted to decimal.
40% Multiplier
A 40% increase corresponds to a multiplier of 1.4.
30% Multiplier for Increase
A 30% increase corresponds to a multiplier of 1.3.
30% Multiplier for Decrease
A 30% decrease corresponds to a multiplier of 0.7.
