bell work explain why jamars solution was incorrect
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Review on Solving Proportions Hint: Use Cross Products and solve for x!TRANSCRIPT
Bell Work
• Explain why Jamar’s solution was incorrect.
6-2B Percent 6-2B Percent ProportionProportion
Review on Solving Proportions
1.
2.1008.412
x
10052 x
Hint: Use Cross Products and solve for x!
Percent Proportions
• Since we know we can represent a percent as a fraction over 100, we can set up proportions to find missing values!
100percent
wholepart
Types of Percent Problems
Percent Proportion Steps:
1.Write out proportion2. Find Cross Products3. Solve
Practice- You TryRally Coach
1.What percent of 50 is 18?2.What number is 2% of 35?3.What percent of $90 is $9?4.What number is 25% of 180?
6-2C Percent 6-2C Percent EquationEquation
Percent Equation
Find the Part
Find the Percent
Find the Whole
Three Types of Percent Problems
Practice- You TryRally Coach
1.What is 6% of 19?2. 27 is what percent of 150?3.What percent of 40 is 9?4. 24 is 32% of what number?5.14% of what number is 7?
Sales tax and Sales tax and tip! tip!
Adding that little extra!
Vocabulary• Sales tax
Sales
Sales TaxMethod 1:1) Calculate the tax of the total (% as decimal x total price)2) Add tax to total3) Check that it makes sense!
Method 2:1) Calculate the final price including the tax (total x 1+% as decimal, ex: 7% tax x by 1.07)2) Check that it makes sense!
Discuss with your shoulder partner two different
methods for calculating sales tax!
You try- Choose Your Method!
What is the total cost of a sweatshirt if the regular price is $42 and the sales tax is 5 ½ %?
Vocabulary• Sales tax
• Tip or Gratuity
Tip or GratuityMethod 1:1) Calculate the tip of the total (% as decimal x total price)2) Add tax to total3) Check that it makes sense!
Method 2:1) Calculate the final price including the tip (total x 1+% as decimal, ex: 20% tip x by 1.2)2) Check that it makes sense!
You try- Choose Your Method
Scott wants to tip his taxicab driver. If his commute costs $15 and he wants to give the driver a 20% tip, what is the total cost?
Wrap up!• Explain to your shoulder partner
the two different ways to calculate tax and tip!
• Explain why one method might be easier than the other.
DiscountDiscountSaving some money!
Vocabulary• Sales tax
• Tip or Gratuity
•Discount
Discounts• Similar to Tip and Discount, but you subtract!
Method 1: 1)Find the percent of the total (this is discount amount)2)SUBTRACT the discount from the total3)Check that it makes sense!
Method 2:1)Find the percent you will actually be paying by
subtracting the given percent from 100% (example: 30 % off 100-30 = 70% you will pay)
2)Multiply the percent you will pay in decimal form by the total
3)Check that it makes sense!
You try- Choose Your Method
1)A shirt is regularly priced at $42. It is on sale for 15% off. What is the sale price of the shirt?
2)What is the total WITH 7% tax?
Wrap up!• Describe two methods for finding the
sale price of an item that is discounted 30%.
• Which method do you prefer? Explain.