1. Unit 6. Day 16.

2. Example A: A store advertises the following sale: shoes are off the original price. If a pair of shoes normally costs $40, what is the sales price?
What is of 40? 𝑥
sale
25 100
sale = 40
normal
normal
1 4
40 1 𝑥 = ∙ 40
1000 =
100𝑥
40 4
100
100 𝑥 = = 10 𝑥 = 10 40 40 − 10 − 10 30 30

3. Example B: A used car salesperson receives a commission of of the sales price of the car for each car he sells. What would the sales commission be on a car that sold for $21,999?
What is of 21999?
commission 𝑥
8. 3 1
commission =
car
100 12
21999
car
1 12 𝑥 = ∙
21999
100𝑥
12𝑥 = =
21999
100 12 12
100 𝑥 = 𝑥 𝑥 = = = =

4. 𝑃𝑟𝑜𝑓𝑖𝑡? What is 1 5 of 3200? What is 1 3 of 2400? $ 2400 $ 3200 +
Example C: How much profit will the business make on the sale of a couch that is marked up by and then sold at a off discount if the original price is $2,400?
What is of 3200?
What is of 2400?
1 5
3200 1
1 3
2400 1 𝑥 = ∙
3200 𝑥 = ∙
2400
3200 5
2400 3 𝑥 = 𝑥 = = =
640
800
$ 2400
$ 3200 +
$ 800 − $
𝑃𝑟𝑜𝑓𝑖𝑡?
$ 3200
$ 2560

5. Example D: A motorcycle dealer paid a certain price for a motorcycle and marked it up by of the price he paid. Later, he sold it for $14,000. What was the original price?
14000
retail
retail = 𝑥
wholesale
wholesale
120𝑥 =
120
120 𝑥 =
11,666.67