Understanding Percent Increase and Decrease

The video tutorial demonstrates how to use tape diagrams to help students visualize and solve percent increase and decrease problems. It includes examples such as calculating the percent decrease in heart rate and the percent increase in shoe sales. The focus is on understanding the problem visually rather than relying on memorized algorithms.

What is the primary purpose of using tape diagrams in percent problems?

• To provide a step-by-step solution

• To replace traditional algorithms

• To help students visualize and understand the problem

• To make calculations faster

In the heart rate problem, what does the original 90 beats per minute represent?

• The final heart rate

• The decrease in heart rate

• The average heart rate

• 100 percent of the original heart rate

How is the decrease in heart rate visually represented in the tape diagram?

• As a different color section

• As a percentage label

• As a part of the original tape

• As a separate tape

What is the percent decrease in heart rate from 90 to 72 beats per minute?

• 15%

• 18%

• 20%

• 25%

In the shoe mart problem, what does the 50 pairs of loafers represent?

• 100 percent of the original sales

• The sales after the increase

• The increase in sales

• The total sales in August

How is the 40% increase in sales represented in the tape diagram?

• As a separate calculation

• As a percentage label

• As an additional section on the original tape

• As a new tape

What is the total number of loafers sold in August after a 40% increase?

• 90 pairs

• 80 pairs

• 70 pairs

• 60 pairs

Why is visual representation important in solving percent problems?

• It eliminates the need for calculations

• It provides exact answers

• It helps students understand the problem

• It simplifies the math