Proportions And Percents
•Download as PPT, PDF•
0 likes•508 views
This document provides examples and explanations for calculating percentages and using percentages to solve problems. It begins with examples of writing percentages as fractions. It then demonstrates how to find a percentage of a whole number using proportions. Examples are provided for finding specific percentages of given numbers, as well as finding the whole number when given a percentage and part. The document concludes with examples of using percentages to solve for unknown whole numbers.
Recommended
More Related Content
What's hot
Viewers also liked
Viewers also liked (20)
Similar to Proportions And Percents
Similar to Proportions And Percents (20)
More from Jessca Lundin
More from Jessca Lundin (16)
Recently uploaded
Recently uploaded (20)
Proportions And Percents
- 1. Chapter 6, Section 5: Proportions and Percents Reminder : a percentage is the number over 100 (as the denominator). Warm Up: Write each percentage as a fraction. 1) 24% 2) 75.5% 3) 132% 1) 24/100 2) 75.5/100 3) 132/100
- 2. Finding Part of a Whole IS over OF IS and Number -> Numerator OF and Number -> Denominator Find 65% of 245 1) turn the percentage into a fraction 2) make a proportion 3) cross product 65 100 = 245 x (65)(245) = (x)(100) -> 15,925 = (x)(100) -> x = 159.25
- 3. IS over OF IS and Number -> Numerator OF and Number -> Denominator 25% of 124 is? 25/100 25 100 = x 124 Now use cross product to determine what 25% of 124 is. (25)(124) = (x)(100) -> 3100 = (x)(100) -> 31 = x
- 4. IS over OF IS and Number -> Numerator OF and Number -> Denominator Find the missing Part. 1) 43% of 230 is? 2) 12.5% of 80 is? 3) 132% of 45 is? 1) x = 98.9 2) x = 10 3) x = 59.4
- 5. IS over OF IS and Number -> Numerator OF and Number -> Denominator Finding a Percent: Remember, percentage is the number, over 100. What percent (%) of 60 is 52 ? Of 60 is the denominator Is 52 is the numerator ? 100 = 52 60
- 6. IS over OF IS and Number -> Numerator OF and Number -> Denominator 1) What Percentage of 250 is 138? 2) 14 is what percentage of 15? Have Ms. D-H Check!
- 7. IS over OF IS and Number -> Numerator OF and Number -> Denominator Finding Whole Amounts: Remember, percentage is the number, over 100. 1) 207 is 46% of what number? 2) 19 is 75% of what number? 3) 310 is 99% of what number? 1) whole = 450 2) whole = 25.333 3) Whole = 313.1313
- 8. Using Percents to Solve a Problem Assignment #22 Practice 6-5 www.phschool.com Code: awe-0605