Page 481 - Basic College Mathematics with Early Integers

458 C HAPTE R 6 I PERCENT

Concept Extensions

For each equation, determine the next step taken to find the value of n. See the first Concept Check in this section.

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57. 5 n = 32
5 32
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a. n = 5 32 b. n = c. n = d. none of these
32 5
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58. n = 0.7 12
12 0.7
a. n = 8.4 b. n = c. n = d. none of these
0.7 12

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59. 0.06 = n 7
0.06 7
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a. n = 0.06 7 b. n = c. n = d. none of these
7 0.06
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60. 0.01 = n 8
8 0.01
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a. n = 0.01 8 b. n = c. n = d. none of these
0.01 8
61. Write a word statement for the equation 62. Write a word statement for the equation
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20% n = 18.6. Use the phrase “some number” 1
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n = 33 % 24. Use the phrase “some number”
for “n”. 3
for “n”.

For each exercise, determine whether the percent, n, is (a) 100%, (b) greater than 100%, or (c) less than 100%. See the
last Concept Check in this section.

63. n% of 20 is 30 64. n% of 98 is 98 65. n% of 120 is 85 66. n% of 35 is 50

For each exercise, determine whether the number, n, is (a) equal to 45, (b) greater than 45, or (c) less than 45.

67. 55% of 45 is n 68. 230% of 45 is n 69. 100% of 45 is n

70. 30% of n is 45 71. 100% of n is 45 72. 180% of n is 45

73. In your own words, explain how to solve a percent 74. Write a percent problem that uses the percent 50%.
equation.

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Solve.

75. 1.5% of 45,775 is what number? 76. What percent of 75,528 is 27,945.36?

77. 22,113 is 180% of what number?