Percent Change and Its Calculations

In this video, Mr. J explains how to calculate percent change through four examples. The video covers both percent decrease and increase, demonstrating calculations step-by-step. It also addresses how to handle large percent changes and rounding decimals to the nearest percent. The video aims to help viewers understand the process of calculating percent change and apply it to various scenarios.

What is the first step in calculating percent change?

• Divide the new value by the original value

• Subtract the original value from the new value

• Subtract the new value from the original value

• Multiply the original value by 100

In the first example, what was the percent decrease from 45 to 36?

• 15%

• 25%

• 20%

• 10%

How do you convert a decimal to a percent?

• Multiply the decimal by 100

• Multiply the decimal by 10

• Add 10 to the decimal

• Divide the decimal by 100

What was the percent increase from 16 to 28 in the second example?

• 25%

• 100%

• 75%

• 50%

In the third example, what was the percent increase from 22 to 55?

• 150%

• 50%

• 100%

• 200%

What does a negative percent change indicate?

• An increase

• A decrease

• No change

• A doubling

If a value decreases from 80 to 31, what is the percent change?

• 61.25% decrease

• 48.75% decrease

• 61.25% increase

• 48.75% increase

What should you do if you encounter a long or repeating decimal in percent change calculations?

• Divide it by 10

• Round it to the nearest percent

• Ignore it

• Multiply it by 10

What is the approximate percent decrease when rounding -61.25%?

• -60%

• -61%

• -63%

• -62%

What is the significance of a 100% increase?

• The original value is doubled

• The original value is tripled

• The original value remains the same

• The original value is halved