Page 480 - Basic College Mathematics with Early Integers

S E C T I O N 6.2 I SOLVING PERCENT PROBLEMS USING EQUATIONS 457

Solve. See Examples 11 and 12.

21. What percent of 80 is 88? 22. What percent of 40 is 60?

23. 17 is what percent of 50? 24. 48 is what percent of 50?

Objectives Mixed Practice Solve. See Examples 1 through 12.

25. 0.1 is 10% of what number? 26. 0.5 is 5% of what number? 27. 150% of 430 is what number?

1 1
28. 300% of 56 is what number? 29. 82.5 is 16 % of what number? 30. 7.2 is 6 % of what number?
2 4

31. 2.58 is what percent of 50? 32. 2.64 is what percent of 25? 33. What number is 42% of 60?

34. What number is 36% of 80? 35. What percent of 184 is 64.4? 36. What percent of 120 is 76.8?

37. 120% of what number is 42? 38. 160% of what number is 40? 39. 2.4% of 26 is what number?

40. 4.8% of 32 is what number? 41. What percent of 600 is 3? 42. What percent of 500 is 2?

43. 6.67 is 4.6% of what number? 44. 9.75 is 7.5% of what number? 45. 1575 is what percent of 2500?

46. 2520 is what percent of 3500? 47. 2 is what percent of 50? 48. 2 is what percent of 40?

Review

Find the value of n in each proportion. See Section 5.2.

27 9 35 7 n 8 n 6
49. = 50. = 51. = 52. =
n 10 n 5 5 11 3 13

Write each phrase as a proportion.

53. 17 is to 12 as n is to 20 54. 20 is to 25 as n is to 10 55. 8 is to 9 as 14 is to n 56. 5 is to 6 as 15 is to n