Applications of Percents

1
Applications of Percents

• Discounts
• Sales Tax
• TipsCommission

2
1)Jim needs to buy a winter jacket. The jacket
he wants is on sale for 20 off 120 in store A.
The same jacket is on sale for 25 off 140 in
store B. At which store can Jim buy the jacket
for less money?
Store B 25 off
Store A 20 off
120
140
3
20 of 120
25 of 140
Store B 25 off
Store A 20 off
120
140
4
20 of 120
25 of 140
.2 x 120
.25 x 140
Store B 25 off
Store A 20 off
120
140
5
20 of 120
25 of 140
.2 x 120
.25 x 140
24 savings
35 savings
Store B 25 off
Store A 20 off
120
140
6
20 of 120
25 of 140
.2 x 120
.25 x 140
24 savings
35 savings
Store B 25 off
Store A 20 off
120
140
-35
-24
96
105
7
20 of 120
25 of 140
.2 x 120
.25 x 140
24 savings
35 savings
The coat will cost less at STORE A
Store B 25 off
Store A 20 off
120
140
-35
-24
96
105
8
2)A stereo system usually sells for 250 is on
sale for 225. What is the percent of discount?
225
9
You get to save 25 off the regular price.
Regular Price 250
Sale Price 225
Savings 25
225
10
Now compute the percent by making a fraction.
Savings 25
Regular Price 250
225
11
Now convert the fraction to a decimal and a
percent.
Savings 25
.1 10
Regular Price 250
225
12
3) Jason can get Bengals tickets at 30 off the
regular price. If the tickets normally cost 65,
how much will it cost Jason to purchase 2
tickets?
13
30 of 65
14
30 of 65
.3 x 65
19.50 savings
15
30 of 65
.3 x 65
19.50 savings
Regular Price 65.00
Savings 19.50
Sale Price 45.50
16
30 of 65
.3 x 65
19.50 savings
Regular Price 65.00
Savings 19.50
Sale Price 45.50
x 2 tickets
91.00
17
4) Jimmy bought a Bengals jersey at the football
game on Sunday. The shirt costs 64, but he had
to pay 6.5 sales tax. How much money did Jimmy
have to pay for the shirt including tax?
64
18
6.5 of 64
64
19
6.5 of 64
.065 x 64
4.16 in tax
64
20
6.5 of 64
.065 x 64
4.16 in tax
Regular Price 64.00
Tax 4.16
Total Cost 68.16
64
21
5) Your bill at the restaurant was 38.00 and you
want to leave a 15 tip. How much money should
you leave?
22
15 of 38
23
15 of 38
.15 x 38
5.70 in tip
24
15 of 38
.15 x 38
5.70 in tip
Dinner Price 38.00
Tip 5.70
Total Cost 43.70
25
6) Jack sells cars for Ford Motor Co. He works
off commission. This means that his earnings
depend upon how much he sells. He makes 5 of
the cost off all cars that he sells. In January,
Jack sold 3 cars that cost a total of 105,000.
How much money did Jack earn in January?
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6) Jack sells cars for Ford Motor Co. He works
off commission. This means that his earnings
depend upon how much he sells. He makes 5 of
the cost off all cars that he sells. In January,
Jack sold 3 cars that cost a total of 105,000.
How much money did Jack earn in January?
5 of 105,000
27
6) Jack sells cars for Ford Motor Co. He works
off commission. This means that his earnings
depend upon how much he sells. He makes 5 of
the cost off all cars that he sells. In January,
Jack sold 3 cars that cost a total of 105,000.
How much money did Jack earn in January?
5 of 105,000
.05 x 105,000
5250 in earnings
28
7) Mr. Dunlap and his family went out to dinner
last night. The bill was 46.23. He had to pay
3.24 in tax. What is the percent of tax that he
had to pay?
29
First make a fraction.
Tip 3.24
Total Cost 46.23
30
Now convert the fraction into a decimal and
percent.
Tip 3.24
.07 7
Total Cost 46.23
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8) You need to buy a book for your moms
birthday. The book, which is regularly priced at
24, is on sale at Barnes Noble for 20 off.
The same book normally sells for 25 at Joseph
Beth. You have a coupon for 5 off any book at
Joseph Beth. At which bookstore should you
purchase the book?
32
Set up a simple chart.
Joseph Beth
Barnes Noble
33
Determine the cost of the book at Barnes Noble.
Joseph Beth
Barnes Noble
20 of 24
.2 x 24
4.80 savings
34
Determine the cost of the book at Barnes Noble.
Joseph Beth
Barnes Noble
20 of 24
.2 x 24
4.80 savings
Regular Price 24.00
Savings 4.80
Sale Price 19.20
35
Now determine the cost of the book at Joseph Beth.
Joseph Beth
Barnes Noble
20 of 24
Regular Price 25.00
.2 x 24
4.80 savings
Savings 5.00
Sale Price 20.00
Regular Price 24.00
Savings 4.80
Sale Price 19.20
36
Now determine the cost of the book at Joseph Beth.
Joseph Beth
Barnes Noble
20 of 24
Regular Price 25.00
.2 x 24
4.80 savings
Savings 5.00
Sale Price 20.00
The book will cost less at Barnes Noble
Regular Price 24.00
Savings 4.80
Sale Price 19.20
37
The End!