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Uploaded byKari Knisely, M.Ed.
Tutorial1
This document provides an introduction to percentages, including where they come from, what they represent, common usages, and why they are useful. It explains that percentages represent a quantity out of 100 to allow for easy comparison. Examples show how to convert percentages to fractions and decimals. Common percentages discussed include discounts, sales taxes, and exam scores. The key reason given for using percentages is that they allow for comparison of different quantities on the same scale from 0% to 100%.
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Tutorial1
- 1. Percentage Basics &Introduction - By Kari Knisely
- 2. What you willlearn… Where percents come from What percents are What percents look like Common percentages used in everyday life Why we use percents
- 3. Where Percents ComeFrom Italian roots most commonly assumed
- 4. Where did percentscome from? Merriam-Webster – click here for more information Encyclopedia/Merriam-Webster – click here for more information Merriam-Webster Dictionary. Retrieved on March, 24 2012 from http://www.merriam- webster.com/dictionary/percent
- 5. What Percents are& Basic Info Converts any quantity into a part of 100 to easily compare
- 6. What is aPercent? Per cent Per 100 ÷ 100 %= parts per 100
- 7. Percents as Fractions Steps 2.Percentagenumber becomes numerator 3.Denominator becomes 100 4.Remove the percent sign 5.Simplify 75 75 25 3 75 % 100 100 25 4 75 % 3 4
- 8. Percents as Decimals Steps 2.Movedecimal 2 places left 3.Remove the percent sign 4.Re-write decimal 75 % 75.0 % 75.0 % 0.75
- 9. Is more than100% possible? 200%
- 10. Is more than100% possible? 175% 75%
- 11. What does apercent look like? %
- 12. What does apercent look like?
- 13. What does apercent look like? 40 Test Questions = 100% = 1.0
- 14. What does apercent look like? 40 Test Questions = 100% = 1.0 50% 50% 20 ?s 20 ?s 0.50 0.50
- 15. What does apercent look like? 40 Test Questions = 100% = 1.0 25% 25% 10 ?s 10 ?s 0.25 0.25 25% 25% 10 ?s 10 ?s 0.25 0.25
- 16. What does apercent look like? 40 Test Questions = 100% = 1.0 12.5% 12.5% 5 ?s 5 ?s 12.5% 0.125 0.125 12.5% 5 ?s 5 ?s 0.125 0.125 12.5% 12.5% 5 ?s 5 ?s 0.125 12.5% 12.5% 0.125 5 ?s 5 ?s 0.125 0.125
- 17. Common Percentage Types Discounts & Sales Tips Taxes
- 18.
- 19. Common Percentage Types Calculate
- 20. Common Percentage Types Calculate
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- 25. Common Percentage Types Original $24.99 Discount - 7.50 Sale Price $17.49 FL Tax Rate 6% = ? Calculate
- 26. Common Percentage Types Original $24.99 Discount - 7.50 Sale Price $17.49 FL Tax Rate 6% = ? Calculate
- 27. Why do weuse percents? Compare different quantities
- 28. Why do weuse percents? Brad’s Math Test Kim’s Science Test 45 questions correct 52 questions correct IF 50 questions total IF 60 questions total
- 29. Why do weuse percents? 45 ?s If 50 total ?s 0 ?s 12.5 ?s 25 ?s 37.5 ?s 50 ?s 0% 25% 50% 75% 100% ≈ 90% Brad’s Math Test 45 questions correct IF 50 questions total
- 30. Why do weuse percents? Kim’s Science Test 52 questions correct IF 60 questions total 52 ?s If 60 total ?s o ?s 15 ?s 30 ?s 45 ?s 60 ?s 0% 25% 50% 75% 100% ≈ 87%
- 31. Why do weuse percents? 45 ?s If 50 total ?s 0 ?s 12.5 ?s 25 ?s 37.5 ?s 50 ?s 0% 25% 50% 75% 100% ≈ 90% 52 ?s If 60 total ?s o ?s 15 ?s 30 ?s 45 ?s 60 ?s 0% 25% 50% 75% 100% ≈ 87%
- 32. Why do weuse percents? Brad’s Math Test Kim’s Science Test 45 questions correct 52 questions correct IF 50 questions total IF 60 questions total = 90% = 87%
- 33. Why do weuse percents? Brad’s Math Test Kim’s Science Test 16 questions correct 16 questions correct IF 20 questions total IF 24 questions total
- 34. Why do weuse percents? 16 ?s If 20 total ?s 0 ?s 5 ?s 10 ?s 15 ?s 20 ?s 0% 25% 50% 75% 100% ≈ 80% Brad’s Math Test 16 questions correct IF 20 questions total
- 35. Why do weuse percents? Kim’s Science Test 16 questions correct IF 24 questions total 16 ?s If 24 total ?s o ?s 6 ?s 12 ?s 18 ?s 24 ?s 0% 25% 50% 75% 100% ≈ 65%
- 36. Why do weuse percents? 16 ?s If 20 total ?s 0 ?s 5 ?s 10 ?s 15 ?s 20 ?s 0% 25% 50% 75% 100% ≈ 80% 16 ?s If 24 total ?s o ?s 6 ?s 12 ?s 18 ?s 24 ?s 0% 25% 50% 75% 100% ≈ 65%
- 37. Why do weuse percents? Brad’s Math Test Kim’s Science Test 16 questions correct 16 questions correct IF 20 questions total IF 24 questions total ≈ 80% ≈ 65%
- 38. What you havelearned… Where percents come from What percents are What percents look like Common percentages used in everyday life Why we use percents
- 39. Works Cited Allimages retrieved from Google images
- 40. Why do weuse percents? 16 ?s If 20 total ?s 0 ?s 5 ?s 10 ?s 15 ?s 20 ?s 0% 25% 50% 75% 100% ≈ 80% 16 ?s If 24 total ?s o ?s 6 ?s 12 ?s 18 ?s 24 ?s 0% 25% 50% 75% 100% ≈ 65%
- 41. Why do weuse percents? 45 ?s If 50 total ?s 0 ?s 12.5 ?s 25 ?s 37.5 ?s 50 ?s 0% 25% 50% 75% 100% ≈ 90% 52 ?s If 60 total ?s o ?s 15 ?s 30 ?s 45 ?s 60 ?s 0% 25% 50% 75% 100% ≈ 87%
Editor's Notes
- #29 Can we assume Kim did better than Brad because she got more questions right even though there were different amounts of questions on the tests? ? 100 is an easy number to work with. If we compare the two test scores out of parts per 100 then we can compare them evenly.
- #33 Can we assume Kim did better than Brad because she got more questions right even though there were different amounts of questions on the tests? ? 100 is an easy number to work with. If we compare the two test scores out of parts per 100 then we can compare them evenly.
- #34 Can we assume Kim did better than Brad because she got more questions right even though there were different amounts of questions on the tests? ? 100 is an easy number to work with. If we compare the two test scores out of parts per 100 then we can compare them evenly.
- #38 Can we assume Kim did better than Brad because she got more questions right even though there were different amounts of questions on the tests? ? 100 is an easy number to work with. If we compare the two test scores out of parts per 100 then we can compare them evenly.