Birthday Parties
• At Zach’s birthday party, Zach is seated along
with 7 guests at a rectangular table. Zach knows
Gabe and Brooks from Cub Scouts, Christopher
is his cousin, and Emily, Ian, Julie, and Lafern
are from Zach’s class. Zach is sitting at the head
of the table, with the girls all sitting on one side,
to Zach’s right. His cousin is sitting at the
opposite end of the table between Julie and Ian.
Brooks is in the middle, opposite Emily.
• Draw a seating plan to show where everyone
is sitting.
• Starting with Christopher at the head of
the table and moving clockwise around the
table, the seating plan is as follows:
Christopher, Julie, Emily, Lafern, Zach
(opposite Christopher), Gabe, Brooks, and
Ian.
Sales Tax and Discount
Lesson 8-5
Sales tax and discount
• Sales tax - is an additional amount of
money charged on items people buy. The
total cost is the regular price plus the sales
tax.
• Discount – the amount by which the
regular price of an item is reduced. The
sale price is the regular price minus the
discount.
Sales Tax
• The local, state, or federal government
receives this money.
• For example if:
• Louisiana State sales tax is 4%
• Vermilion Parish sales tax is 4.5%
• Total rate of tax is 8.5%
Sales Tax: Finding the total cost.
• A pair of shoes cost $90, and the sales tax
is 4.25%. What is the total cost of the
shoes?
• First find the amount of sales tax.
4.25% of 90 =
4.25% x 90
$3.83 (This is the amount of tax being
charged on the sale. So to find the
total cost we add the tax to the
original price.)
Sales Tax: Finding the total cost.
Add the sales tax to the original price.
90 + 3.83 =
$93.83 is the total cost of the shoes.
Sales Tax
• A set of golf balls sells for $20, and the
sales tax is 5.75%. What is the total cost?
•
•
•
•
5.75% of 20
5.75% x 20 =
Add the sales tax to the original price.
$1.15
$20 + $1.15 =
• $21.15
Sales Tax
• Your Turn:
• A video game system cost $130 and the
sales tax is 6.5%. What is the total cost of
the video game system?
The total cost = $138.45
Discount: Finding the sale price.
• Alan wants to buy a bike that has a regular
price of $169. This week the bike is on
sale at a 35% discount. What is the sale
price of the bike?
• 35% of 169
• 35% x 169 =
• The discount is $59.15
Discount: Finding the sale price.
• Subtract the discount from the original
price.
• $169 - $59.15 =
• The sale price is $109.85
Discount
• Your Turn:
• Whitney wants to buy a new coat that has
a regular price of $185. This weekend, the
coat is on sale at 33% off. What is the
sale price of the coat?
• $123.95
Find the Percent of the Discount
• An electric guitar is on sale. What is the
percent of the discount?
Original Price
• First find the amount of the
$299.95
discount.
Sale Price
$299.95 - $179.99 =
$179.99
$119.96
This is the amount you save.
$119.96 is what percent of $299.95
Find the Percent of the Discount
• $119.96 is what percent of $299.95
119.96
299.95
p
=
100
p = 39.99
Round to the nearest whole number.
p = 40 The discount is 40%
Find the percent of discount
• Your Turn:
• A sports watch has an original price of
$86. The sale price is $60.20. What is the
percent of discount?
• 30%
Practice
• Work with a partner to complete:
Pg. 356 # 12, 14, 16, 22 and 24.
Your Homework:
Complete lesson 8-5 # 2-20 evens