1. Types of Percentage Problems
By: Kari Knisely

2. What you will learn…
Problems where you may need to solve for any of
the following:
Amount before a change
 Amount after a change
Percent after a change
 Percent of change
 Amount of change

3. Amount before change
 Original amount before taxes, tips, discounts, and
changes
 Starting amount before taxes, tips, discounts, and
changes
 Subtotal amount before taxes, tips, discounts, and
changes

4. Amount before change
What was the original price?

5. Amount before change
How many questions were on the test?

6. Amount before change
What was the subtotal?

7. Amount before change
What was the original price if purchased in FL?

8. Amount after a change
 Ending amount after taxes, tips, discounts and changes
 Final amount after taxes, tips, discounts and changes
 Total amount after taxes, tips, discounts and changes

9. Amount after a change
$30.00
What price will you pay?

10. Amount after a change
How many questions were correct?

11. Amount after a change
Subtotal
$9.00
How much total will you leave?

12. Amount after a change
What is the total price after tax?

13. Percent after a change
 Ending percentage of original 100% after taxes, tips,
discounts and changes
 Final percentage of original 100% after taxes, tips,
discounts and changes
 Total percentage of original 100% after taxes, tips,
discounts and changes

14. Percent after a change
Original $30.00
Total $25.00
(after discount)

15. Percent after a change
What percent of the questions were
answered correctly?

16. Percent after a change
Subtotal $8.59
Total $12.00
(including tip and 6% sales tax)

17. Percent after a change
Original $79.99
Total $62.00
(after discount and sales tax)

18. Percentage of Change
 Percent of Tax (increase original 100% starting
percentage)
 Percent of Tip (increase original 100% starting
percentage)
 Percent of Discount (decrease original 100% starting
percentage)
 Percent of Change (increase or decrease original 100%
starting percentage)

19. Percentage of Change
Original $30.00
Total $25.00
(after discount)

20. Percentage of Change
What percent of the questions were
answered incorrectly?

21. Percentage of Change
Subtotal $8.59
Total $12.00
(including tip and 6% sales tax)

22. Percentage of Change
Original $79.99
Total $84.49
(after sales tax)
*Sale was not in FL

23. Amount of Change
 Amount of Tax (increase original amount)
 Amount of Tip (increase original amount)
 Amount of Discount (decrease original amount)
 Amount of Change (increase or decrease based on
situation)

24. Amount of Change
Original $30.00
40% discount

25. Amount of Change
How many questions were answered
incorrectly?

26. Amount of Change
Subtotal $8.59
Total $12.00
(including tip and 6% sales tax)

27. Amount of Change
Original $79.99
*FL Sales Tax is 6%

28. What you learned…
Problems where you may need to solve for any of
the following:
Amount before a change
 Amount after a change
Percent after a change
 Percent of change
 Amount of change

29. Works Cited
 All images retrieved from Google images