Percentage Increase & Decrease - Using Multipliers

This video tutorial explains how to calculate percentage increases and decreases using multipliers. It begins with an introduction to the concept of multipliers, which are based on decimals. The video then details how to find multipliers for percentage increases by adding the percentage to 100% and converting it to a decimal. Similarly, it explains percentage decrease multipliers by subtracting the percentage from 100% and converting it to a decimal. The tutorial includes examples and practice problems to reinforce the concepts, emphasizing the efficiency of using multipliers for quick calculations.

What is the primary advantage of using multipliers for percentage calculations?

• They are only useful for large percentages.

• They eliminate the need for a calculator.

• They simplify and speed up the calculation process.

• They provide exact results without any error.

How is a multiplier for a 25% increase represented as a decimal?

• 0.25

• 0.75

• 1.25

• 2.25

What does the '1' in a percentage increase multiplier like 1.25 represent?

• The percentage increase

• The original amount

• The total percentage

• The decimal conversion

How do you calculate a percentage decrease multiplier?

• Divide the percentage by 100 and convert to decimal.

• Multiply the percentage by 100 and convert to decimal.

• Add the percentage to 100 and convert to decimal.

• Subtract the percentage from 100 and convert to decimal.

In the train ticket example, what is the multiplier for a 20% decrease?

• 0.8

• 1.8

• 0.2

• 1.2