DO NOW Plickers Standard 7RP3 Use proportional relationships to solve multistep ratio and percent problems Examples simple interest tax markups and markdowns gratuities and commission fees percent increase and decrease percent error ID: 727432
Download Presentation The PPT/PDF document "Ratios and Percents RP. 3." is the property of its rightful owner. Permission is granted to download and print the materials on this web site for personal, non-commercial use only, and to display it on your personal computer provided you do not modify the materials and that you retain all copyright notices contained in the materials. By downloading content from our website, you accept the terms of this agreement.
Slide1
Ratios and Percents
RP. 3. Slide2
DO NOW
Plickers
Slide3
Standard
7.RP.3
Use proportional relationships to solve multistep ratio and percent problems. Examples: simple interest, tax, markups and markdowns, gratuities and commission, fees, percent increase and decrease, percent error.Slide4
Teaching Point
Students Slide5
VIDEOSlide6
Discounts Slide7
Step by Step-Finding Sale Price
Step 1: Multiply the regular price by the discount percent(written as a decimal). You find the
DISCOUNT
Step 2: Subtract the Discount from the regular price. You find the sale price
SALE PRICESlide8
Example #1
A shirt is regularly priced at $36.00 It is on sale at 25% off. What is the sale price?Slide9
A shirt is regularly priced at $36.00 It is on sale at 25% off. What is the
sale price
?
Step 1:
Multiply the regular price by the discount
percent.
(36)(25%
.25) = 9
Step 2:
Subtract the Discount from the regular price. You find the sale
price
36 – 9 =
27
The sale price is $27 Slide10
Example #2
Find the sale price
The regular price of a suit is $150.00. It is discounted 10%Slide11
The regular price of a suit is $150.00. It is discounted 10
%.
Find the
sale price
?
Step 1:
Multiply the regular price by the discount
percent.
(150)(10%
.10) = 15
Step 2:
Subtract the Discount from the regular price. You find the sale
price
150 – 15 =
135
The sale price is $135Slide12
Your Turn
Find the Sale Price:
Sneakers selling at $45.00, on sale at 25% off.
Sweaters selling regularly at $50.00 discounted 50%.
Sunglasses selling at 29.95, on sale at 15%
CD’s selling regularly at $14.95 on sale at 10% off.Slide13
Another Way
Step 1: Subtract the percentage of the discount from 100
Step 2: Multiply that number(as a decimal) by the regular price –
SALE PRICE Slide14
Example #1
A shirt is regularly priced at $36.00 It is on sale at 25% off. What is the sale price?Slide15
A shirt is regularly priced at $36.00 It is on sale at 25% off. What is the sale price?
Step 1: Subtract the percentage of the discount from 100
100%-25% = 75%
Step 2: Multiply that number(in decimal) by the regular price –
SALE PRICE
(75%
.75)(36) = $27.00
The sale price is $27 Slide16
The regular price of a suit is $150.00. It is discounted 10%. Find the
sale price
Step 1: Subtract the percentage of the discount from 100
100%-10% = 90%
Step 2: Multiply that number(in decimal) by the regular price –
SALE PRICE
(90%
.90)(150) = $135.00
The sale price is $135Slide17
Let’s Play A Game
Each group must write down the answer to the question
First group to do it wins points for
that questions