Page 501 - Basic College Mathematics with Early Integers

478 C HAPTE R 6 I PERCENT

Find the amount of decrease and the percent decrease. See Example 6.

Original Amount New Amount Amount of Decrease Percent Decrease
41. 8 6
42. 25 20
43. 160 40
44. 200 162

Solve. Round percents to the nearest tenth, if necessary. See Examples 5 and 6.
45. There are 150 calories in a cup of whole milk and only 46. In reaction to a slow economy, the number of
84 in a cup of skim milk. In switching to skim milk, employees at a soup company decreased from 530 to
find the percent decrease in the number of calories 477.What was the percent decrease in the number of
per cup. employees?

47. The number of cable TV systems recently decreased 48. Before taking a typing course, Geoffry Landers could
from 10,845 to 10,700. Find the percent decrease. type 32 words per minute. By the end of the course,
he was able to type 76 words per minute. Find the
percent increase.

49. In 1940, the average size of a privately owned farm in 50. In 2003, 5.5 million digital television sets were
the United States was 174 acres. In a recent year, the sold in the United States. By 2007, this number had
average size of a privately owned farm in the United increased to 27.1 million.What was the percent
States had increased to 449 acres.What is this percent increase? (Source: Motion Picture Association
increase? (Source: National Agricultural Statistics of America)
Service)

51. When music CDs were first introduced in 1983, the 52. In 1994, there were 784 deaths from boating accidents
average suggested list price was $21.50. By 2007, the in the United States. By 2008, the number of deaths
average suggested list price was $14.88.What was the from boating accidents had decreased to 655.What
percent decrease in the average suggested list price was the percent decrease? (Source: U.S. Coast
for music CDs from 1983 to 2007? (Source: Recording Guard)
Industry Association of America)

53. In 2006, there were 3570 thousand elementary and 54. In 2006, approximately 500,000 correctional officers
secondary teachers employed in the United States. were employed in the United States. By 2016, this
This number is expected to increase to 3769 thousand number is expected to increase to 580,000
teachers in 2012.What is the percent increase? correctional officers.What is the percent increase?
(Source: National Center for Education Statistics) (Source: Bureau of Labor Statistics)

55. In a recent 10-year period, the number of indoor 56. As the largest health care occupation, registered Copyright 2012 Pearson Education, Inc.
cinema sites in the United States decreased from nurses held about 2.5 million jobs in 2006.The
6903 to 5545.What is this percent decrease? number of registered nurses is expected to be
(Source: National Association of Theater 3.075 million by 2016.What is the percent increase?
Owners) (Source: Bureau of Labor Statistics)