Understanding Percentage Increase

In this video, Mr. J explains how to calculate the percent of change, focusing on percentage increase. He outlines the formula: subtract the old number from the new number, divide by the old number, and multiply by 100 to convert to a percentage. Two examples are provided: a 25% increase from 12 to 15 and a 64% increase from 50 to 82. The video emphasizes the importance of dividing by the original number to find the relative change. The tutorial concludes with a summary of the steps involved in calculating percentage change.

What is the main focus of the video tutorial?

• Percentage decrease

• Percentage increase

• Calculating averages

• Solving equations

Which of the following is NOT a step in calculating percent of change?

• Convert the result to a percentage

• Divide by the new number

• Subtract the old number from the new number

• Multiply by 100

In the first example, what is the amount of change from 12 to 15?

• 5

• 4

• 3

• 2

What is the percentage increase from 12 to 15?

• 35%

• 20%

• 25%

• 30%

Why is it important to divide by the original number when calculating percent of change?

• To ensure the result is a whole number

• To make the calculation easier

• To compare the change relative to the starting value

• To avoid negative numbers

In the second example, what is the amount of change from 50 to 82?

• 30

• 32

• 33

• 31

What is the percentage increase from 50 to 82?

• 64%

• 62%

• 60%

• 66%

What is the decimal equivalent of 64%?

• 0.46

• 0.54

• 0.64

• 0.74

What is the final step in converting a decimal to a percentage?

• Divide by 100

• Add 10

• Subtract 10

• Multiply by 100

What is the purpose of multiplying by 100 in the percent of change formula?

• To convert the decimal to a fraction

• To convert the decimal to a percentage

• To convert the percentage to a decimal

• To convert the fraction to a decimal