2. Finding discount
Decrease in the price of an item.
It is the amount to be deducted from th
original price
Discount:
3. In terms of percentage, base and rate, the discount and the net
price represent percentage, original price represents the base
and the discount rate represents the rate.
To solve discount problems, the following formulas can be used.
Discount = Original price x rate of discount
4. Example:
Nikki bought a scarf with an original
price of ₱ 250.00. If she received a
discount of 20%, how much is the
scarf?
5. Given:
Original price = ₱ 250.00
Rate of Discount = 20% (0.20)
Solution:
Discount = ₱ 250.00 x 0.20
= ₱50.00
6. To find the amount of scarf,
use the formula,
Amount of the scarf =
Original price - Amount of discount
Solution:
Amount of the scarf = ₱ 250.00 - ₱50.00
= ₱ 200.00
7. Exercise # 3. Solve the given
problem.
The price of an umbrella is ₱ 150.00.
If it is sold at a discount of 15%, then
what is the selling price of the
umbrella?
1.
8. Exercise # 3. Solve the given
problem.
2. The marked price of a water cooler
is ₱ 4650. The shopkeeper offers an
off-season discount of 25% on it. Find
its selling price.
10. In terms of percentage, base and rate, the commission and the
net proceeds represent percentage, total sales represents the
base and the rate of commission represents the rate.
To solve commission problems, the following formulas can be
used.
Commission = total sales x rate of commission
11. Example:
John is selling sets of knives and
makes a 10% commission on all sales.
What would his commission be on the
sale of a ₱32, 500 set of knives?
12. Given:
Total sales = ₱ 32 500.00
Rate of Commission = 10% (0.10)
Solution:
Commission = ₱32 500.00 x 0.10
= ₱3, 250.00
13. Solve the given problem.
Ronald gets 16% commission for
selling a piece of lot. How much will he
receive as a commission if the lot is
sold for ₱ 250,000?
14. Finding Interest
it is the amount of money paid for the use
of money lent over a period of time.
Interest:
15. In terms of percentage, base and rate, the interest represents
interest represents the rate. However, the given rate of interest is
expressed in terms of time.
To solve interest problems, the following formula can be used.
Interest = Rate x Principal x Time
16. Example:
Mark borrowed ₱ 75, 000 from a bank to
start a business. If the interest rate is
18%, how much would he have to pay at
the end of the year?
17. Given:
Principal = ₱ 75, 000
Rate = 18%
Time = 1 year
Solution:
Interest = ₱75, ooo x 0.18 x 1
= ₱ 13, 500.00
