Percent Change and Decrease Concepts

The video tutorial covers the concepts of percent increase and decrease, explaining how to calculate these changes using a formula. It provides examples, such as Amber's wage increase and shoe price changes, to illustrate percent increase. The tutorial also explains percent decrease with examples like moving distances and ticket reductions. Additionally, it discusses compounding interest and demonstrates calculating price changes for a TV. The video includes exercises for viewers to practice these calculations.

What is the formula for calculating percent change?

• Amount of change divided by the new amount

• Amount of change divided by the original amount

• Original amount divided by the new amount

• Original amount divided by the amount of change

If Amber's wage increased from $8 to $9.50, what is the percent increase?

• 20%

• 19%

• 15%

• 18.75%

What does a 100% increase imply?

• The amount triples

• The amount doubles

• The amount increases by 50%

• The amount remains the same

If the price of shoes increases from $52 to $64, what is the percent increase?

• 20%

• 30%

• 23%

• 25%

What is the percent decrease if David moves from 89 miles to 51 miles from his workplace?

• 42.7%

• 45%

• 43%

• 44%

Can a percent decrease be more than 100%?

• No, unless the amount becomes negative

• Yes, if the original amount is large

• No, it is impossible

• Yes, if the decrease is significant

If the number of students in a chess club decreases from 18 to 12, what is the percent decrease?

• 40%

• 30%

• 33%

• 35%

What is the percent decrease if Officer Brinbury issues 16 tickets one week and 10 the next?

• 42.5%

• 40%

• 37.5%

• 35%

How does compound interest differ from a single percentage increase?

• It results in a smaller total increase

• It results in a larger total increase

• It has no effect on the total increase

• It decreases the total amount

If a TV priced at $499 is increased by 10%, what is the new price?

• $550.00

• $549.90

• $551.00

• $548.90