Discount, Sale Price
Original Price- the cost of the item
before the discount is taken off
Discount- how much money is SAVED
from original price
Sale Price- the price after the discount
is taken
Also referred to the discount price
A shirt is priced at 49.99 and on
sale for 20% off. What is the sale
price?
• 49.99
X .20
9.9980
Original price
Steps
1.List original price and
label it
2. change % to a decimal
and multiply by original
49.99 original
price to get discount
- 9.99 discount 3. subtract discount from
original price to get sale
40.00 sale price
price
I want to buy a pair of CLEAR
shoes for 79.99 and it is on sale
for 25% off. Find the discount and
sale price
• 79.99 original price
X .25
19.9975
79.99 original price
-19.99 discount
60.00
sale price
I want to buy a shirt for 29.99 and
pants for 39.99. Both are on sale
for 33% off. Find the discount and
sale price
• There are 2 ways to do this
• do each item separately
• add both items then take discount
29.99 shirt
+39.99 pants
69.98
X .33
23.0934
69.98 sale price
-23.09 discount
46.89 sale price
We are buying an ipod 129.99 on sale
for 20% off. We also buy the skin for it
19.99 on sale for 30% off. What is the
sale price that I pay?
• This one has to be done separately
• Think that it should look like a
receipt from any store
129.99 orig
x.20
25.9980 discount
129.99 orig
- 25.99 dis
104.00 sale price
+
19.99 orig
x.30
5.9970 discount
19.99 orig
- 5.99 dis
14.00 sp 118.00 sp
Now let’s talk about tax
• The type of tax we are going to
use is called sales tax
• It is the amount of money
ADDED to the sale price
• It is usually a different rate in
every city
A jacket is 99.99 and on sale at
25% off. The tax is 8%. Find the
discount, sale price and the total
99.99 original price
x .25
To do tax
24.9975 discount
1.Change
%
to
a
99.99 original price
decimal
-24.99 discount
This 2.Multiply
is also called
tosubtotal
sale
75.00 sale price
which means the total
X .08
price to get tax
before tax
6.00 tax
3.Add tax to sale price
75.00 sale price
to get total
+6.00 tax
81.00 total
A dvd player is 49.99 and on sale for 25%
off. A home theater system is 399.99 and
also on sale for 30% off. Tax is what you pay
in your area. What is the discount, sale
price,
tax, and total for this purchase?
49.99 original price
399.99 original
x .30
x .25
12.4975 discount
119.9997 discount
49.99 original
-12.49 discount
37.50 sale price
399.99 original
- 119.99 discount
280.00 sale price
280.00 sale price of home theater system
+37.50 sale price of dvd player
317.50 subtotal
317.50 subtotal
X .0825 tax rate
23.10 tax
317.50 subtotal
+23.10 tax
340.60 total
For this problem we
did 7 different problems
to get this answer
SIMPLE INTEREST
• The amount of EXTRA money that
someone charges or receives
• Used in the real world talking
about loans, credit cards or
savings accounts
Joe wants to buy a television. The tv costs
$900. Since he does not have the cash to
buy it he uses a credit card. The card
charges 13% interest. How much will Joe
have to pay total for the television?
Formula
I = PRT
• Interest= principal times rate
times the time
Principal- amount of $ either borrowed
or saved
Rate- the interest rate is the %
Joe wants to buy a television. The tv costs
$900. Since he does not have the cash to
buy it he uses a credit card. The card
charges 13% interest for 1 year. How much
will Joe have to pay total for the television?
Write the formula then replace the letters
with numbers and solve
I = PRT
I bought furniture for 2800, 1000 for
the chair and 600 for the ottoman.
They have a special interest for 2
years at 3%.
What is the total someone would pay?
Write formula……
I = PRT
Replace the letters with numbers and solve
I= 264
Total = I + P
to find total we add
Total = 264+4400
interest
To the principal
Total = 4664
I = 4400(3%)(2)
I= 4400(.03)(2)
I= 8800(.03)
COMMISSION
• used in the real world in sales when
a salesperson gets a percentage of
what they sell
• the more they sell the more they
make
• Examples of people who work on
commission are ….
• Selling cars, houses, jewelry and
other expensive items
A salesman sells a camcorder for $999
and gets 8% commission. How much does
he make?
To do
1.Price times commission % to get
commission
999
.08
7992 .
• 1. A jacket is 129.99 and on sale for 20% off.
Tax is 8%. What is the total?
112.32
QUIZ
• 2. What is the subtotal? Price before the tax
• 3. Find the total for a tv for 899.99 and on
sale for 20% off and a dvd for 99.99 with 25%
off. Tax is 7% 850.65
• 4. A piece of wood is 12 ½ ft long. How many
¾ pieces are cut from it? 16 2/3
2
16
3
• 5. A shirt for 39.99 and on sale for 40% off, a
belt for 29.99 and on sale for 25% off and a
pair of clear shoes for 19.99 for 30% off. What
is the total price?
60.50