Transcript Percent Discounts

Discounts, markups and percent
of change
Friday, January 4, 2013
Warm up:
Solve and graph the operation on a number line:
1. -5 - (-3) =
2. -8 + 7 =
3. 6 - (-5) =
Solve:
4. Find the average of the following numbers:
-2, 12, -8, 15
Check homework
Post answers to the word problems at the end of
the Wikispace homework.
Take the time to go over the problems.
Let’s check our work:
Let’s check our work:
Let’s check our work:
Let’s check our work:
Let’s check our work:
Let’s check our work:
Let’s check our work:
Let’s check our work:
Quick Study! Percent of change
How can you use %/100 = part/whole to find the
following percent increases and decreases?
1.
2.
3.
4.
From 100 to 114
From 2.0 to 3.2
From 202 to 192
From 854.5 to 60.6
Discounts & Markups
What is a discount? A discount is the price
decrease when a item goes on sale.
Sale price = regular price – discount
What is a markup? A markup is the amount
more that they charge for an item than what
they bought it for. It is how they make a
profit.
Example 1- Discounts
Athletic shoes that regularly sell for $85.99 are
on sale for 20% off.
1.Set up a proportion to help you find the
discount amount. Find that amount.
2.Find the sale price and be prepared to explain
how you found the sale price.
Example 2- Discounts
A video game that regularly sells for $39.95 is on
sale for 20% off. Find the discount amount
and the sale price.
Example 3: Discounts
Peaches that are usually priced at $2/lb are on
sale for 15% off. Find the discount amount
and the sale price.
Example 1: markups
A music store’s percent of markup is 67%. A CD
costs the store $10.15. Find the markup and
how much the will charge the customer for
the CD.
Example 2: markups
A computer store pays $6 for a computer
mouse. The percent of markup is 75%. Find
the markup amount and what the store will
selling price of the mouse.
Example 3: markups
A cap that cost a retailer $5 was marked up by
75%. Find the selling price as well as the
markup amount.
Homework
MA7+:
Textbook pages 331 – 332 #1-28, evens
and #29-31, all
MA7:
Textbook pages 326 #7-16 (all)