School Maloco National High School Grade Level 11

Teacher FELY M. SESCAR Learning Area General Mathematics

TeachingDates
September 23,2019 Quarter 2
and Time

I. OBJECTIVES
The learner demonstrates understanding of key concepts of
A. Content Standards
simple interest.
B. Performance Standards The learner is able to investigate, analyze and solve problems

involving simple interest.

C. Learning Competencies/ Illustrates and solve problems involving simple interest.

Objectives M11GM-IIb-2
II. CONTENT Simple Interest
III. LEARNING RESOURCES
A. References
1. Teacher’s Guidepages
2. Learner’s Materials pages PP. 137-139
3. Textbook pages
4. Lesson Guide pages

5. Additional materials
from LR portal
B. Other Learning Resources Visual Aid, chalk, board, projector, laptop, calculator
IV. PROCEDURES
A. Reviewing previous lesson or

presenting the lesson Warm Up

1. What is 15% of 15,000?

2. What is 35 increased by 8%?
3. How many months are there in a year?
4. What is 1500 decreased by 75%?
5. What is the percent of increase from 0.32 to 0.64?

B. Establishing a purpose for 4 pics 1 word

the lesson The students will observe if what are the common things on the

given four pictures and then create a word using the letters

below by putting it in the box.

 CLUE : This is what we call the additional amount from the

borrowed money or money in the bank.

I N T E R E S T

N E A S R B

C T Y I T E
Today, we’ll be discussing Simple Interest.
C. Presenting examples/ If we borrowed money from a bank or a lending company,

instances of the new lesson. the borrowed amount is called loan. However, at the time of

returning the loan to the bank or lending company, we have

to pay back an amount somewhat bigger than the loan and

that is what we call Simple Interest.

When you borrow money from a bank, you pay interest for

the use of the bank’s money. When you deposit money into a

savings account, you are paid interest. Simple interest is

one type of fee paid for the use of money.

Let us first have the vocabulary of the terms that we are

going to use.

Simple Interest (I) is interest that is computed on the

principal and then added to it.

Principal is the amount of money borrowed or invested (P)

Rate of interest is the percent charged or earned (r)

Time that the money is borrowed or invested (in years) (t)

And with those, we came with the formula in computing for

simple interest,

I=Prt

That is our main formula in solving for simple interest.

How about if the unknown is not the interest, but instead are

the Principal, the rate or the time? How can we find for those

unknown?
 We simply use the main formula in finding for those.

Let start with finding for the Principal Amount.

I=Prt

I P •r •t
=
r• t r •t

I
=P
r• t

In finding for Rate, we have

I=Prt

I P •r •t
=
P •t P •t

I
=r
P •t

This time, since you know the simple steps in

finding for the unknown, it is the students task to

find for the formula in solving for the unknown

Time.

I=Prt

I P •r •t
=
P •r P•r

I
=t
P •r

Let’s apply those formula by doing the given activity.

D. Discussing the new concepts Complete the table below by finding for unknown.
Principal (P) Rate (r) Time (t) Simple Interest
and practicing new skills
(a) #1 2.5% 4 1,500
36,000 (b) 1.5 4,860 Example 1
250,000 0.5% (c) 275
500,000 12.5% 10 (d) A bank offers 0.25% annual simple

interest rate for a particular deposit. How much interest will

be earned if 1 million pesos is deposited in this savings

account for 1 year?

Given: P = 1,000,000 r =0.25% = 0.0025 t= 1 yr

Find: Simple Interest

 Solution: I =P•r•t

=1,000,000 • 0.0025 • 1

= 2,500

Example 2

How much interest is charged when P50,000 is borrowed for

9 months at an annual interest rate of 10%.

Given: P = 50,000 r = 10% = 0.10 t = 9months = 9/12=

0.75 yr

Find: Simple Interest

Solution: I =P•r•t

= 50,000 • 0.10 • 0.75

= 3,750
E. Discussing new concepts and Example 3.

practicing new skills # 2 When invested at an annual interest rate of 7%, the amount

earned P11,200 of simple interest in two years. How much

money was originally invested?

What are the given? What is the unknown? Who can show

the solution on the board?

Example 4.

If an entrepreneur applies for a loan amounting to P500,000

in a bank, the simple interest of which is P157,500 for 3

years, what rate is being charged?

Enumerate the given then find for the unknow.

F. Developing mastery With your partner, pick one paper inside the box and solve it.

Share with your classmate the computation that you have.

G. Finding practical applications Student will give a list of situations they have encounter where

of concepts Simple Interest is involved.

and skills in daily living
H. Making generalizations and What have you learned for today? Is it essential for you?

abstractions about the lesson. Who can give me the formula in finding for the simple interest?

Can you summarized the lesson that we had today? (From the

vocabulary to its formula.)

 I. Evaluating Learning Exercise 1. Solve the following problems.

1. Find the simple interest on a loan of 65,000 if the loan is

given at a rate of 20% and is due in 3 years?

2. Miko borrowed 250,000 and repaid it after 5 years. If he

repays 250,000 and additional interest of 86,250, how

much interest rate applied?

3. If you deposit 5,650 pesos in a bank at an annual simple

interest rate of 0.5%, how many years do you need to

wait for you to have a total amount of 5,989?

J. Additional Activities for Supplementary exercise.

application or remediation 1. John’s parents deposited 50,000 peoss into a savings

account as a college fund when he was born. How much

will John have in this account after 18 years at a yearly

simple interest rate of 3.25%?

2. Bertha have an amount of 95,000 in her account. How

much money did Bertha deposit 50 years ago if its yearly

simple interest rate is 7.5%?

I. V. REMARKS
II. VI. REFLECTION
A. No. of learners who earned
III. 80% in evaluation

B. No. of learners who require

additional activities for

remediation who scored

below 80%
C. Did the remedial lessons

work?
No. of learners
who have caught up
with the lesson
D. No. of learners who continue

to require remediation
E. Which of my teaching

strategies worked well?

IV. Why did these work?
F. What difficulties did I

encounter which
my principal or superior
can help me solve?
G. What innovation or localized

materials did I use/discover

which I wish to share with

other teachers?