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Proportional Reasoning

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by

tama ogaja

on 21 May 2012

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Transcript of Proportional Reasoning

Formulas
Definitions
Tax,Tip,Discount,And Markup
(cc) photo by Metro Centric on Flickr
(cc) photo by Franco Folini on Flickr
(cc) photo by jimmyharris on Flickr
(cc) photo by Metro Centric on Flickr
Tax
Tip
1st step
Tax
original price * % (as a decimal)
= amount of tax
amount of tax + original price
= final price
Discount
Markup
original price * % (as a decimal)
= amount of tip
amount of tip + original price
= final price
6% sales tax on one 13 inch television that cost $60
What is the sales tax?
$3.60
0.06 * 60
6/100 * 60
2nd Step
Answer
Discount - A deduction from the usual cost of something
Tax - a sum of money demanded by a government for its support or for specific facilities or services, levied upon incomes, property, sales, etc
Markup - The amount added to the cost price of goods to cover overhead and profit.
Tip - a sum of money given to someone as a way of rewarding them for their services
Percent- a specified amount in every hundred
Lets try some problems
1st step
2nd step
Last step
Tip
1st step
Answer
Last step
Discount
(cc) image by nuonsolarteam on Flickr
1st step
Answer
Last step
Markup
(cc) image by nuonsolarteam on Flickr
You buy $20 worth of food at a restaurant tax included and you wish to tip 10% how much tip should you leave, and what is the total cost of everything after tip
$20 * 10/100
Answer
20 * .10
2
Tip
Total cost
$2
$22
an item that originally cost $20 is discounted by 25% find the amount of discount
$5.oo
$20.00*25/100
20.00 * .25
A chair that sold for $65 is marked up to $70.20 What is the percent of the markup?
original price * % (as a decimal)
= amount of discount
original price - amount of discount
= final price
final price - beginning price
/ beginning price
= markup rate in % form
8%
5.20 / 65
70.20
- 65.00
to change a decimal into a percent move the decimal point 2 spaces to the left
to change a percent into a decimal divide the number by 100
Greatest Super Hero
Jamon
Important
Details
try these
Tom the mad scientist
Tama is the
#1
Teacher

Sources
Tom the mad scientist - http://prezi.com/dpqe5z-tpuqb/academy-inserting-animations-in-prezi/
Batman, Jamon, and other figures - http://prezi.com/dpqe5z-tpuqb/academy-inserting-animations-in-prezi/
Quiz
http://teachers.henrico.k12.va.us/math/ms/c30708/02Computation/2_2/8032HW1.pdf
http://teachers.sduhsd.net/mlewis1/syllabus_files/PA7/Chapter%209/PA7%20Worksheet-discounts_mark-ups%203.pdf
trash can -http://www.songwritingscene.com/wp-content/uploads/2012/02/iStock_000012357961XSmall-300x300.jpg
crumpled up paper-http://1.bp.blogspot.com/-9OkzmPxwZRQ/Taw0mXZOfyI/AAAAAAAAEEk/-96rhs-y2GQ/s1600/CRUMPLED+PAPER.jpg
Original price of an MP3 player: $99.50
Tax: 4%
Cost of an MP3 player: $129.50
Markup: 60%
Find the final price
You will come in and sit down if not quiet in 2 min your seats will be changed
Rules
Raise your hand if you have a question
Dont talk when Tama or Dong are speaking
Respect
Use indoor voices
Taxes Brainpop Video
http://www.brainpop.com/math/ratioproportionandpercent/taxes/
Sources
Brain Pop video
http://www.brainpop.com/math/ratioproportionandpercent/taxes/
for paying attention
Full transcript