Chapter 6 - Percent - Chapter 6 Percent Chapter Sections...

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Chapter 6 Percent
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Martin-Gay, Basic College Mathematics with Early Integers 2 6.1 – Percents, Decimals, and Fractions 6.2 – Solving Percent Problems Using Equations 6.3 – Solving Percent Problems Using Proportions 6.4 – Applications of Percents 6.5 – Percent and Problem Solving: Sales Tax and Commissio 6.6 – Percent and Problem Solving: Interest Chapter Sections
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§ 6.1 Percents, Decimals, and Fractions
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Martin-Gay, Basic College Mathematics with Early Integers 4 Understanding Percent Step Example Percent : Means per one hundred, the “%” symbol is used to denote percent. 48 of 100 squares are shaded or 48% is shaded. % 48 100 48 =
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Martin-Gay, Basic College Mathematics with Early Integers 5 Writing Percent as Decimals EXAMPLE EXAMPLE SOLUTION SOLUTION 67% of American men are happy with their current weight. Convert this percentage into a decimal. ( Source: Gallup for Wheat Foods Council) Replace the “%” symbol with its decimal equivalent. .67 of American men are happy with their current weight. % 67 ) 01 . 0 ( 67 67 . ) 01 . 0 ( 67 =
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Martin-Gay, Basic College Mathematics with Early Integers 6 Writing Decimals as Percents EXAMPLE EXAMPLE SOLUTION SOLUTION The Munoz family saves 0.10 of their take-home pay. Convert this decimal to a percent. Multiply the decimal by 1 in the form of 100%. The Munoz family saves 10% of their take-home pay. %) 100 ( 10 . 0 10% or .% 10 = 10 . 0 %) 100 ( 10 . 0
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Martin-Gay, Basic College Mathematics with Early Integers 7 Writing Percents as Fractions EXAMPLE EXAMPLE SOLUTION SOLUTION Write 4.5% as a fraction or mixed number in simplest form. Replace the percent symbol with its fraction equivalent. % 5 . 4 100 1 5 . 4 100 1 5 . 4 100 5 . 4 = Multiply by 1 in the form of to remove the decimal in the numerator.
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