Page 489 - Basic College Mathematics with Early Integers

466 C HAPTE R 6 I PERCENT

Concept Extensions

x 25
57. Write a word statement for the proportion = . 58. Write a percent statement that translates
28 100
16 20
Use the phrase “what number” for “x.” to = .
80 100

Suppose you have finished solving four percent problems using proportions that you set up correctly. Check each answer
to see if each makes the proportion a true proportion. If any proportion is not true, solve it to find the correct solution.
See the Concept Checks in this section.

a 25 520 65
59. = 60. =
64 100 b 100
Is the amount equal to 17? Is the base equal to 800?

p 13 36 p
61. = 62. =
100 52 12 100
Is the percent equal to 25 (25%)? Is the percent equal to 50 (50%)?

63. In your own words, describe how to identify the 64. In your own words, explain how to use a proportion
percent, the base, and the amount in a percent to solve a percent problem.
problem.

Solve. Round each to the nearest tenth.

65. What number is 22.3% of 66. What percent of 110,736 is 67. 8652 is 119% of what number?
53,862? 88,542?

Copyright 2012 Pearson Education, Inc.