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Unit 2 Percentages Presentation 1 Presentation 2 Presentation 3

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Presentation on theme: "Unit 2 Percentages Presentation 1 Presentation 2 Presentation 3"— Presentation transcript:

1 Unit 2 Percentages Presentation 1 Presentation 2 Presentation 3
Conversion Presentation 2 Conversion: Revision Presentation 3 Percentages of Quantities Presentation 4 Quantities as Percentages Presentation 5 Percentage Increases and Decreases

2 Unit 2 Percentages Conversion

3 What is as i) decimal and ii) fraction?
as a fraction in its simplest form

4 What is as a percentage? Express as a fraction with 100 as the denominator

5 What is as a percentage? Write as a fraction with 100 as the denominator

6 You have finished viewing the presentation Conversion Please choose an option
Return to the Start Presentation 2 Conversion: Revision Presentation 3 Percentages of Quantities Presentation 4 Quantities as Percentages Presentation 5 Percentage Increases and Decreases

7 Unit 2 Percentages Conversion: Revision

8 Fractions Decimals Percentages

9 You have finished viewing the presentation Conversion: Revision Please choose an option
Return to the Start Presentation 1 Conversion Presentation 3 Percentages of Quantities Presentation 4 Quantities as Percentages Presentation 5 Percentage Increases and Decreases

10 Percentages of Quantities
Unit 2 Percentages Percentages of Quantities

11 First convert the percentage into either a fraction or decimal
Find of J$76 First convert the percentage into either a fraction or decimal Decimal method

12 First convert the percentage into either a fraction or decimal
Find of J$76 First convert the percentage into either a fraction or decimal Fraction method

13 You have finished viewing the presentation Percentages as Quantities Please choose an option
Return to the Start Presentation 1 Conversion Presentation 2 Conversion: Revision Presentation 4 Quantities as Percentages Presentation 5 Percentage Increases and Decreases

14 Quantities as Percentages
Unit 2 Percentages Quantities as Percentages

15 In a class of 25 students, there are 10 girls
In a class of 25 students, there are 10 girls. What percentage of the class are girls? The fraction of girls is: As a percentage, this is:

16 A book contained 80 black and white pictures and 120 colour pictures
A book contained 80 black and white pictures and 120 colour pictures. What percentage of the pictures were in colour? The fraction of colour pictures: As a percentage this is:

17 A bank pays interest of % per annum
A bank pays interest of % per annum. How much interest do you get in one year if you invest J$50? Interest

18 You have finished viewing the presentation Quantities as Percentages Please choose an option
Return to the Start Presentation 1 Conversion Presentation 2 Conversion: Revision Presentation 3 Percentages of Quantities Presentation 5 Percentage Increases and Decreases

19 Percentage Increases and Decreases
Unit 2 Percentages Percentage Increases and Decreases

20 Percentage increase Example: The population of a village increased from 234 to 275 in one year. What was the percentage increase? Actual increase (to 2 decimal places)

21 Percentage decrease Example: A cup of sand is dried in a hot oven
Percentage decrease Example: A cup of sand is dried in a hot oven. Its mass reduces from 450 grams to 320 grams. What is the percentage decrease of its mass? Actual reduction Percentage reduction (to 1 decimal places)

22 You have finished viewing the presentation Percentage Increases and Decreases Please choose an option Return to the Start Presentation 1 Conversion Presentation 2 Conversion: Revision Presentation 3 Percentages of Quantities Presentation 4 Quantities as Percentages

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