1. The document discusses percentage, rate, and base. It provides examples of how to identify the rate, base, and percentage in word problems. 2. Students work through stations to practice identifying the rate, base, and percentage in different problems. They also practice using a Teachan's triangle to determine rate, base and percentage. 3. The lesson defines percentage as a part of a whole, rate as the number written with percent or %, and base as the total or whole number that follows "percent of" or "% of".

1. Lesson 57: Defining
Percentage, Rate or Percent
and Base

2. Mental Computation
Drill on Renaming Fractions to Decimals to
Ratio and Vice-Versa
1/2
2/5

3. Review:
Matching Game
Fraction Decimal Ratio
1/4
0.75
40%
4
1

4. Mechanics:
1. Teacher post the 2 charts on the board.
2. Divide the class into 3 group. Give each group a well shuffled set
of a number cards.These cards are then distributed to the group
members with each receiving one card.
3. When the signal is given by the teacher, a pupil from each group
simultaneously goes to the board and places the number card in the
correct slot.
4. The pupils will go to their group and tap the next player. Continue this until the
chart has been completed.
5. The group that finishes first, with the most number of correct answers win.

5. Motivation:
Showing a paper clips. Where do we used these paper clips?
Problem Opener:
Rafaela has 10 paper clips. She gives 2 paper
clips to her seatmate and keeps the rest for the future
use. Is it right for her to say that she keeps 80% of
the paper clips?

6. Questions to answer:
1. Who has 10 paper clips?
2. To whom does she give 2 paper clips?
3. if you were Rafaela will you also keep
materials for the future? Why?

7. Present the table:
10 2
2
10
20% 8
8
10
80%

8. Let the pupils identify rate, base and percentage.
The rate is the percent of the whole. It has the percent
symbol (%).
The base is the whole we’re talking about. It is written after the
word “of” or the phrase “percent of”
The percentage is the portion of the whole based on the rate. It
is usually followed by the word “is”.

9. Using the Techan’s Triangle, ask them to determine the
rate, base, and percentage
P
R B
2
20% 10
If you were Rafaela will you also keep materials for the future?
Why?

10. A. Let the pupils work in pair. Each
pair works on every station
simultaneously. Each of them will
check their answers and present
their output.

11. Station 1: 5 is what percent of 50
What is the rate? ______
Station 2: 40% of 60 is what?
What is the percentage? ______
Station 3: 16 is 25% of 64
The base is ________
Station 4: 15% of total sales is P 8 910.
The rate is ________
Station 5: 43% of 150 is 64.5
The base is __________

12. Let the class the class check their answers by
pairs and present their outputs one at a time.
After all pairs have presented, ask “What is the
meaning of percentage?Rate?
Base? How will you determine the base in a
given problem? The rate?and the
Percentage?

13. Say: The percentage is the portion of the whole
based on the rate. It is usually followed
By the word “is”. The rate is the percent of the
whole. It has the percent symbol (%).
The base is the whole we are talking about. It is written after
the word “of” or the phrase “percent of”.

14. Summarizing the Lesson
What is the meaning of percentage? Rate?Base?
Percentage is a part of a whole. It is the resulting
fractional part of the base. Rate is the number
written with the word “percent” or with the
symbol “%”. Base is the total or whole and it is
the number that usually follows the phrase
“percent of” or “% of”.

15. Assessment:
Encircle the letter of the correct answer.
1. When one finds what percent one number is of another,
we looks for the______.
a. base c. percentage
b. rate d. ratio
2. Finding a number when a percent of it is known means
solving for the _______
a. base c. percentage
b. proportion d. ratio

16. 3. 16 is 25% of 64. The percentage in the problem is
__________.
a.16 b. 64 c.25% d. 41
4. Two of the 50 pieces of tomatoes in the basket
are rotten. This is 4% of all the tomatoes In the
basket. Which is the rate?
a. 50 b. 4% c. 2 d. 48

17. 5. Seven of the 35 boys in the class
wear eyeglasses. 20% of the boys
wear eyeglasses. Which is the
base?
a. 20% b. 7 c. 35 d. 40

18. Home Activity
Identify the R, B, and P in the ff. statements:
1. 180% of 200 is 360
2. 35% of 90 is 31.5
3. P100 is 4% of P2 500
4. 20% of 50 is 10