Basic Mathematics for College Students

Translate to a percent equation or percent proportion and then
solve to find the unknown number.See Example 4.

27. 8 is what percent of 32?


28. 9 is what percent of 18?


29. 51 is what percent of 60?


30. 52 is what percent of 80?

Translate to a percent equation or percent proportion and then
solve to find the unknown number.See Example 5.

31. 5 is what percent of 8?


32. 7 is what percent of 8?


33. 7 is what percent of 16?


34. 11 is what percent of 16?

Translate to a percent equation or percent proportion and then
solve to find the unknown number.See Example 6.

35. What percent of 60 is 66?


36. What percent of 50 is 56?


37. What percent of 24 is 84?


38. What percent of 14 is 63?

Translate to a percent equation or percent proportion and then
solve to find the unknown number.See Example 7.

39. 9 is 30% of what number?


40. 8 is 40% of what number?


41. 36 is 24% of what number?


42. 24 is 16% of what number?

Translate to a percent equation or percent proportion and then
solve to find the unknown number.See Example 8.

43. 19.2 is of what number?


44. 32.8 is of what number?


45. 48.4 is of what number?


46. 56.2 is of what number?

TRY IT YOURSELF

Translate to a percent equation or percent proportion and then
solve to find the unknown number.

47. What percent of 40 is 0.5?


48. What percent of 15 is 0.3?


49. 7.8 is 12% of what number?


50. 39.6 is 44% of what number?

16

2

3

%

66

2

3

%

33

1

3

%

33

1

3

%

51. of what number is 33?


52. of what number is 28?


53. What number is 36% of 250?


54. What number is 82% of 300?


55. 16 is what percent of 20?


56. 13 is what percent of 25?


57. What number is 0.8% of 12?


58. What number is 5.6% of 40?


59. 3.3 is 7.5% of what number?


60. 8.4 is 20% of what number?


61. What percent of 0.05 is 1.25?


62. What percent of 0.06 is 2.46?


63. 102% of 105 is what number?


64. 210% of 66 is what number?


65. of what number is 5.7?


66. of what number is 5,000?


67. What percent of 8,000 is 2,500?


68. What percent of 3,200 is 1,400?


69. Find of 600.


70. Find of 800.

APPLICATIONS

71. DOWNLOADING The message on the computer
    monitor screen shown below indicates that 24% of the
    50K bytes of information that the user has decided to
    view have been downloaded to her computer at that
    time. Find the number of bytes of information that
    have been downloaded. (50K stands for 50,000.)


72. LUMBER The rate of tree growth for walnut trees is
    about 3% per year. If a walnut tree has 400 board feet
    of lumber that can be cut from it, how many more
    board feet will it produce in a year? (Source:Iowa
    Department of Natural Resources)

24% 50k

Loading...

1

3

4

%

7

1

4

%

1

2

%

9

1

2

%

66

2

3

%

33

1

3

%

6.2 Solving Percent Problems Using Percent Equations and Proportions 531