8.3 Percent Increase and Decrease

What number is 20% more than 15?

What number is 30% less than 40?

Mathematical Equivalence

ON

Mathematical Equivalence

ON

Mathematical Equivalence

ON

What number is 60% more than 4.8?

In the original 1999 U.S. version of the game show Who Wants to Be a Millionaire, the dollar values of each question were as shown in the following table:

Between which two consecutive questions is the percent increase of the value the smallest?

• Question 1 to Question 2

• Question 2 to Question 3

• Question 3 to Question 4

• Question 11 to Question 12

What kind of change is in the price per candy bar this week as compared to last week?

• Increase

• Decrease

What is the percent change in the price per candy bar this week as compared to last week?

(note: type only the number)

Karl bought five folders from Pay-A-Lot at a cost of $2.50 each. Pay-A-Lot had a 20%-off sale the following day. How much could Karl have saved on the purchase by waiting a day?
(note: type only the number)