Chapter 6 Test Review

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					Chapter 6 Test Review

         Percents
      Simple Interest
Question 1

• What is 81% of 75.9?
• Part = %
  Whole 100
• Is = %
   Of   100
• X = 81
 75.9   100
X = 61.479
Question 2A

• NO CALCULATOR!!!

Covert 5 to a decimal and
         8
Percent!
Question # 2B.

• NO CALCULATOR!!!!
• The new container of kool-aid
  contains 30% more juice. If the
  old container held 24 fl oz,
  ABOUT how many ounces does
  it contain now?
Question 3

• If 11% of 300 students walked
  to school today, how many
  students walked to school
  today?

•  X = 11
  300 100
• X = 33 students
Question 4
•  A clothing store gave a 12% discount on
   a $400 coat. There was a 7% sales tax.
   How much was the coat?
•   X = 12
  400    100
• X = $48 – this is the discount
•  400 – 48 = 352
•   X = 7
   352 100 which = $24.64 in taxes!
ADD THEM UP!!! = $376.64
Question 5

• Last year, a new car cost $11,000. If
  the price increased by 4%, how
  much would the car cost now?
• X =      4
 11,000 100
X = $440, but this is how much the car
  increased by!
Answer: 11,000 + 440 = $11,440
Question 6

• What is the percent of change?
• 72 is decreased to 45
• Amount of Change = %
    Original Amount      100
• 27 = X
   72     100
• X = 37.5%
Question 7
• Travis scores 13 points in the first
  basketball game of the season. The
  second basketball game Travis
  scores 18 points. What percent of
  increase is this?
• 5 = X
   13   100
• X = 38.5%
Question 8
• Teresa deposits $4,000 in an
  account that earns 7% simple
  interest. How long will it be before
  the total amount is $6,500.
• I = $2,500 P = $4,000 r = 7% t = ?
• 2,500 = 4,000 x 7% x t
• Simplify: 4,000 x 7%
• 2,500 = 280t
• t = 9 years
Question 9

If 350 people were surveyed, how
  many of them chose pecan pie
  as their preference?
Question 9 Answer

• 8% chose pecan pie, so let’s set
  up a proportion.
• X = 8
  350 100
• X = 28 people
Question 10




• How many degrees of the circle
  graph make up the sector for apple
  pie?

				
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