Page 509 - Basic College Mathematics with Early Integers

486 C HAPTE R 6 I PERCENT

Objectives Mixed Practice Complete each table.

Purchase Price Tax Rate Sales Tax Total Price Sale Commission Rate Commission
35. $305 9% 39. $235,800 3%
36. $243 8% 40. $195,450 5%
37. $56 5.5% 41. $17,900 $1432
38. $65 8.4% 42. $25,600 $2304

Review

Multiply. See Sections 3.3 and 4.5.

3 2 3
43. 2000 # # 2 44. 500 # # 3 45. 400 # # 11
10 25 100
1 2 3
#
#
46. 1000 # # 5 47. 600 0.04 # 48. 6000 0.06 #
20 3 4
Concept Extensions

Solve. See the Concept Check in this section.

49. Your purchase price is $68 and the sales tax rate is 50. Your purchase price is $200 and the tax rate is 10%.
9.5%. Round each amount and use the rounded Choose the best estimate of the total price.
amounts to estimate the total price. Choose the best
a. $190 b. $210 c. $220 d. $300
estimate.
a. $105 b. $58 c. $93 d. $77
Tipping

One very useful application of percent is mentally calculating a tip. Recall that to find 10% of a number, simply move the
decimal point one place to the left.To find 20% of a number, just double 10% of the number.To find 15% of a number,
find 10% and then add to that number half of the 10% amount. Mentally fill in the chart below.To do so, start by
rounding the bill amount to the nearest dollar.

Tipping Chart
Bill Amount 10% 15% 20%
51. $40.21
52. $15.89
53. $72.17
54. $9.33

55. Suppose that the original price of a shirt is $50. 56. Which is better, a 30% discount followed by an
Which is better, a 60% discount or a discount additional 25% off or a 20% discount followed by
of 30% followed by a discount of 35% of the an additional 40% off? To see, suppose an item
reduced price? Explain your answer. costs $100 and calculate each discounted price.
Explain your answer. Copyright 2012 Pearson Education, Inc.

57. A diamond necklace sells for $24,966. If the tax 58. A house recently sold for $562,560.The commission
rate is 7.5%, find the total price. rate on the sale is 5.5%. If the real estate agent is to
receive 60% of the commission, find the amount
received by the agent.