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Table of Contents. Topic Page #. 3.5/3.6 Ratios and Proportions 41. 3.7 Percents 43. 3.7B Solve Percent Problems 45. 3.7B Solve Percent Problems. #45. Ex 1:

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  1. Table of Contents Topic Page # ... 3.5/3.6 Ratios and Proportions 41 3.7 Percents 43 3.7B Solve Percent Problems 45

  2. 3.7B Solve Percent Problems #45

  3. Ex 1: The survey results show that 33 of the 220 students choose macaroni and cheese for lunch. What percent is that? 3 5 11 1

  4. Ex 2: The school survey shows that 40 out of 220 students bought lasagna for lunch on Friday. What percent is that? 5 11

  5. Ex 3: In a school transportation survey of 225 students, 18 of the students said they walk to school. What percent of students walk to school? 2 4 9 1

  6. Ex 4: After completing 10 laps in the Daytona 500, a driver has completed 5% of the race. How many laps does the race have? 1 2

  7. Ex 5: A family spends $408 one month for food. This was 40% of its income. What was their monthly income? 1 51 5 20

  8. Percent of change: Indicates how much a quantity increases or decreases with respect to the original amount

  9. Percent of increase: New amount is greater than original amount

  10. Percent of decrease: New amount is less than original amount

  11. Ex 6: State whether each percent of change is a percent of increase or decrease. Then find the percent of change. Round to the nearest whole percent.

  12. a. Original: 16 New: 20 increase of 4 1 4 25 1

  13. b. Original: 80 New: 44 decrease of 36 9 4 5 1

  14. Ex 7: Wendy worked for $6 an hour for the first month she was on the job. She was then given a raise to $6.24 an hour. What was the percent of her wage increase? 0.04 1

  15. Ex 8: A car stereo that originally cost $175 was on sale for $150. What was the percent of decrease for the car stereo? (round to 2 decimal places) 1 7

  16. Ex #9: Find the new amount. a. Increase 70 by 80% 8 10 7 1

  17. Ex #9: Find the new amount. b. Increase 14 by 45% 9 50 7 10

  18. Ex #9: Find the new amount. 4 c. Decrease 40 by 20% 2 5 1

  19. Ex #9: Find the new amount. d. Decrease 110 by 90% 9 10 11 1

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