WHAT PERCENT? PROBLEMS To see the answer, pass your mouse over the colored area. 11. 28 out of 100 students got A. 11. a) What percent got A? 28% 11. b) What percent did not get A? 72% 12. 81 students in the class were brunettes, 14 were blondes, and 5 were 12. a) What percent were brunettes? 81%, since 81 + 14 + 5 = 100. 12. b) What percent were blondes? 14% 12. c) What percent were red-heads? 5% 13. a) 32 out of 100 people responded Yes. What percent responded 13.
b) 32 out of 200 people responded Yes. What percent responded 13.
c) 32 out of 50 people responded Yes. What percent responded 14. Solve each proportion. And explain why each one is a proportion. 14. a) 9 out of 20 is equal to 45 out of 100. Because: 5 times 20 is 100. And 5 times 9 is 45. 14. a) 9 is what percent of 20? 45% 14. b) 27 out of 300 is equal to 9 out of 100. Because: A third of 300 is 100. And a third of 27 is 9. 14. a) 27 is what percent of 300? 9% 14. c) 8 out of 32 is equal to 25 out of 100. Because: 8 is a quarter of 32. And 25 is a quarter of 100. 14. a) 8 is what percent of 32? 25% 15. In a class of 25 students, 4 were absent. What percent were 16. What percent were present? 84% 16. Jennifer had $50 and she spent $49. What percent of her money did 17. What percent does she have left? 2% 17. A team played 20 games and won 17 of them. What percent did 17. What percent did they lose? 15% 18. In a survey of 200 people, 84 responded Yes. What percent 19. In a survey of 200 people, 85 responded Yes. What percent 10. 128 out of 400 students took French. What percent took 11. 129 out of 400 students took French. What percent took 12. In a survey of 1000 students, 682 responded No. What percent
13. In a later survey of 1000 students, 846 responded No. What
percent 14. 500 people recently voted, and 325 voted for candidate A. What (Compare Example 9.) 15. 500 people recently voted, and 328 voted for candidate B. What 16. In each of the following, the Amount has what ratio to -- is what 16. For example, 15 is what percent of 20? 15 is three fourths of 20 16. because 15 and 20 have a common divisor 5. Therefore, 15 is 75% of 20. 16. a) 9 is what percent of 45? 9 is the fifth part of 45. 9 is 20% of 45. 16. b) What percent of 16 is 4? 4 is the fourth part of 16. 4 is 25% of 16. 16. c) What percent of 4 is 16? 16 is four times 4. 16 is 400% of 4. 16. d) 12 is what percent of 36?
16. e) What percent of 18 is 9? 9 is half of 18. 9 is 50% of 18. 16. f) What percent of 9 is 18? 18 is two times of 9. 18 is 200% of 9. 16. g) 6 is what percent of 60? 6 is the tenth part of 60. 6 is 10% of 60. 16. h) 18 is what percent of 60?
18 is the 16. i) 12 is what percent of 30? 12 is the two fifths of 30. (Common divisor 6.) 12 is 40% of 30. 16. j) 18 is what percent of 27?
16. k) 7 is what percent of 56? 7 is the eighth part of 56. 7 is 12½% of 56. 16. l) 20 is what percent of 8? 20 is two and a half times 8. 20 is 250% of 8. 16. m) What percent of 4 is 13? 13 is three and a quarter times 4. 13 is 325% of 4. 17. Clearing of decimals. Rephrase each question with whole
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