This document provides instruction on calculating percentages, rates, and bases. It includes examples of percentage problems with calculations showing the rate, base and percentage. Students are given practice identifying the rate, base and percentage in example problems through group and individual activities. Key terms are defined and additional examples are worked through step-by-step. The objectives are to understand the meaning of rate, base and percentage and be able to determine them when given problems or equations.

1. 1. Give the meaning of the elements
(rate, base, percentage)
2. Determine the rate, base or
percentage in a given problem or
equation
OBJECTIVE
S:

2. Matching Game

4. On her birthday, Inna received
P1,500.00 from her godmother.
With her money, she spent
40% for a blouse, and saved
the rest. How much was used
in buying a blouse?

5. Answer the questions:
1. Who received money from her godmother?
2. Why did her godmother give her money?
3. How much did she receive from her
godmother?
4. What did she do with her money?
5. If you were Inna, will you do the same?
Why?

6. On her birthday, Inna received
P1,500.00 from her godmother.
With her money, she spent
40% for a blouse, and saved
the rest. How much was used
in buying a blouse?

7. Analyze the problem and answer the
questions:
1. What is asked in the problem?
2. What facts are in the problem?
3. What is the operation to be used?
4. What is the number sentence?
5. What is the answer?

8. Terms to Remember:
 B = (Base) the number of which a given
number is of another
 R = (Rate) what percent a certain number is
of another
 P = (Percentage) the number of which a
given number is a certain percent

9. Solution:
B = P1,500 (Amount received by Inna
R = 40% (Percent spent for a blouse)
P = ?
P = B x R
P = P1,500 x .40
P = P600

10. Another example:
1.) 50% of 40 is 20.
 B = 40
 R = 50%
 P = 20

11. Another example:
2.) Henry bought a barong with 15%
discount or P150. The barong must
have a tag price of P1,000.
 B = P1,000
 R = 15%
 P = P150

12. Another example:
3.) 180% of 200 is 360.
 B = 200
 R = 180%
 P = 360

13. Group Activity
Rules to follow
Rubrics for Group Output
Presentation

14. Group Activity
Identify the rate, base and percentage by completing
the table.
Rate Bas
e
Percentag
e
1.) 6 is 25% of 24
2.) 20% of 15 is 3
3.) 500 is 62.5% of 800
4.) 125% of 60 is 75
5.) 30 is 50% of 60
6.) 60 is 20% of 300

15. Group Activity
Identify the rate, base and percentage by completing
the table.
Rate Bas
e
Percentag
e
1.) 6 is 25% of 24 25% 24 6
2.) 20% of 15 is 3 20% 15 3
3.) 500 is 62.5% of 800 62.5% 800 500
4.) 125% of 60 is 75 125% 60 75
5.) 30 is 50% of 60 50% 60 30
6.) 60 is 20% of 300 20% 300 60

16. Game ka na
ba?2% of 30 is 6. What is the base?
Answer: The base is 30.

17. Proceed to next question

18. 25% of 140 is 35. What is the rate?
Answer: The rate is 25%

19. Proceed to next question

20. 15 is 23% of 65. What is the
percentage?
Answer: The percentage is 15.

21. Proceed to next question

22. Why is it that parents
usually prefer to buy items
on sale?

23. What is the meaning of
percentage? rate? base?

24. Direction: Determine the rate, base and
percentage:
1.) 20% of 50 is 10.
2.) 80 is 125% of 64.
3.) 8% of 1,200 is 96.
4.) 48 is 40% of 120.
5.) Twenty-one is 25% of 84.

25. Assignment: Identify the rate, base and
percentage in the following statements:
1.) 180% of 200 is 360
2.) 35% of 90 is 31.5
3.) 6.6 is 12% of 55
4.) 60% of 80 is 48
5.) 120% of 3 500 is 4 200

26. Try again

27. Try again

28. Try again