Applying Ratios, Rates, and Proportions: Percent Proportion, Sales Tax, Tip, Discount, and Simple In

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Applying Ratios, Rates, and Proportions Percent
Proportion, Sales Tax, Tip, Discount, and Simple
Interest
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Percent Proportion

• is
• of 100

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Percent Proportion Problems

• Remember is/of /100
• Find 20 of 375.
• x/375 20/100
• x 75

27 is what percent of 45? 27/45 x/100 x60
75 is 25 of what number? 75/x 25/100 x 300
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PRACTICE PERCENT PROPORTION

• Workbook page 82
• Team Captain person who has a birthday closest
  to today. Choose a team name.
• http//www.quia.com/cb/34888.html

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SALES TAX, TIP, DISCOUNT

• Knowing how to calculate sales tax, tip, and
  discounts will help you determine how much money
  youre actually spending when you shop or eat out.

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Sales Tax, Tip, and Discount
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MONEY MATTERS

• A 53 racquet at Sports Galore is on sale for 20
  off the regular price.
• What is the amount of the discount?
• What is the sale price ?

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PRACTICE SALES TAX, TIP, DISCOUNT

• Workbook page 86
• Team Captain person who has the longest hair.
  Choose a team name.
• http//www.quia.com/cb/55701.html
• Omit the middle column
• http//www.quia.com/cb/113078.html
• Omit the first column

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SIMPLE INTEREST

• Simple interest is the amount
• paid for the use of money.

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FORMULA

• I P x R x T

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INTEREST EQUALS

• PRINCIPAL - the amount of money invested or
  borrowed
• RATE - in the annual interest
• TIME - in years

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SAVINGS ACCOUNT

• You can also use the formula to find the simple
  interest when you deposit money in a savings
  account

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INVESTING

• Angie has 500 in a savings account that pays 5
  simple interest.
• How much interest will she earn in 2 years?
• How much interest will she earn if she withdraws
  the money after 9 months?

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HOME IMPROVEMENT

• If you borrow 5,000 at 11.5 for 3 years to make
  home repairs and improvements. How much will you
  have to pay back, including interest?

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PRACTICE SIMPLE INTEREST

• Team Captain person who has the largest hands.
  Choose a team name.
• http//www.quia.com/cb/55701.html
• Middle column first
• http//www.quia.com/ba/108800.html
• Workbook page 87

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PERCENT OF CHANGE

• When shopping for roses the originally cost was
  36 dollars before Valentines Day is now on sale
  for 18 dollars.
• What is the percent of decrease of the roses?

Created ByLynn Husen Pat Layton Maury Middle
Dandridge, TN