Math unit2 percentages
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This document contains 5 presentations on the topic of percentages: 1) Conversion, which explains how to convert fractions and decimals to percentages. 2) Conversion: Revision, which reviews converting between fractions, decimals, and percentages. 3) Percentages of Quantities, which demonstrates calculating percentages of amounts. 4) Quantities as Percentages, which shows expressing quantities as percentages. 5) Percentage Increases and Decreases, explaining how to calculate percentage change from original to final amounts.
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This document contains 5 presentations on decimals and fractions: 1) multiplying and dividing decimals, 2) converting fractions and decimals, 3) negative numbers, 4) operations with negative numbers, and 5) estimating answers. The presentations provide examples and explanations of key concepts for each topic.
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This document covers a lesson on fractions, decimals, and percents. It includes examples of writing fractions, decimals, and percents in equivalent forms by: writing fractions in simplest form; writing percents as fractions and decimals; writing decimals as fractions and percents; and writing fractions as percents and decimals. It provides step-by-step explanations and examples for converting between these number forms. It concludes with a brief quiz to assess understanding of converting between fractions, decimals, and percents.
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This document discusses how to convert between decimals, fractions, and percents. It provides examples for converting non-repeating and repeating decimals to fractions by dropping the decimal point and putting the number over the place value. It also demonstrates how to convert fractions to decimals by dividing the numerator by the denominator and moving the decimal point. Additionally, it shows how to convert decimals to percents by moving the decimal point two places to the right and adding the percent sign, and how to convert percents to decimals by moving the decimal point two places to the left and dropping the percent sign.
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1) The document provides instructions for converting between percents, decimals, and fractions. It explains that a percent is a ratio out of 100 and shows how to write a percent as a decimal by moving the decimal point two places left or as a fraction with a denominator of 100.
2) Several examples are worked out, such as writing 70.3% as the fraction seventy and three tenths hundredths and the decimal 0.307.
3) The document also covers writing percentages as decimals and fractions, like writing 5% as 0.05 or 5/100, and explains that the parts of a circle graph together must equal 100%.
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This document defines decimals, fractions, and percents and provides steps for converting between them. Decimals are numbers with a decimal point, fractions show parts of a whole, and percents express amounts out of 100. To convert a fraction to a decimal, divide the numerator by the denominator. To convert a fraction to a percent, change it to a decimal then multiply by 100. Converting between other forms follows similar steps of changing the number to an equivalent decimal or percent value.
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This document provides an overview of fractions, decimals, and percentages. It explains how to convert between the different representations and compare their values. Key points covered include:
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- To convert a percentage to a fraction, write it as a fraction over 100
- To write a decimal as a percentage, multiply it by 100 and add the percent sign
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This document provides instructions for converting between decimals, percentages, and fractions. It explains that to convert a decimal to a percent, move the decimal point two places to the right and add a percent sign. To convert a percent to a decimal, move the decimal point two places to the left. To convert a fraction to a decimal, divide the numerator by the denominator. And to convert a percent to a fraction, first change it to a decimal and then write the decimal over 100. Examples are given for each type of conversion.
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The document outlines steps for converting between fractions, decimals, and percents. It explains that to convert a fraction to a decimal, you divide the numerator by the denominator. To convert a fraction to a percent, you divide the numerator by the denominator and multiply the decimal by 100. To convert a decimal to a fraction, you name the place value of the last digit as the denominator and make the digits before the decimal the numerator.
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1) The document provides instructions for converting between percents, decimals, and fractions. It explains that a percent is a ratio out of 100 and shows how to write a percent as a decimal by moving the decimal point two places left or as a fraction with a denominator of 100.
2) Several examples are worked out, such as writing 70.3% as the fraction seventy and three tenths hundredths and the decimal 0.307.
3) The document also covers writing percentages as decimals and fractions, like writing 5% as 0.05 or 5/100, and explains that the parts of a circle graph together must equal 100%.
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This document defines decimals, fractions, and percents and provides steps for converting between them. Decimals are numbers with a decimal point, fractions show parts of a whole, and percents express amounts out of 100. To convert a fraction to a decimal, divide the numerator by the denominator. To convert a fraction to a percent, change it to a decimal then multiply by 100. Converting between other forms follows similar steps of changing the number to an equivalent decimal or percent value.
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This document provides an overview of fractions, decimals, and percentages. It explains how to convert between the different representations and compare their values. Key points covered include:
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- To convert a fraction to a percentage, express it with a denominator of 100
- To convert a percentage to a fraction, write it as a fraction over 100
- To write a decimal as a percentage, multiply it by 100 and add the percent sign
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This document provides instructions for converting between decimals, percentages, and fractions. It explains that to convert a decimal to a percent, move the decimal point two places to the right and add a percent sign. To convert a percent to a decimal, move the decimal point two places to the left. To convert a fraction to a decimal, divide the numerator by the denominator. And to convert a percent to a fraction, first change it to a decimal and then write the decimal over 100. Examples are given for each type of conversion.
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- Complements have negative cross-price elasticity while substitutes have positive cross-price elasticity. Income elasticity is positive for normal goods and negative for inferior goods.
- Perfectly elastic and inelastic demand curves are horizontal and vertical lines
Percent change
The document provides examples of calculating percent change from original to new values, showing a 40% decrease when price drops from $100 to $60, and 119% increase when gas price rises from $1.30 to $2.85. It explains that percent change represents the amount of change relative to the original or starting value.
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Math unit2 percentages
- 1. Unit 2 Percentages Presentation 1 Conversion Presentation 2 Conversion: Revision Presentation 3 Percentages of Quantities Presentation 4 Quantities as Percentages Presentation 5 Percentage Increases and Decreases
- 3. What is as i) decimal and ii) fraction? i) ii) 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
- 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. Unit 2 Percentages Percentages of Quantities
- 11. Find of J$76 First convert the percentage into either a fraction or decimal Decimal method
- 12. 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. Unit 2 Percentages Quantities as Percentages
- 15. 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. 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. 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. 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 Percentage increase (to 2 decimal places)
- 21. 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