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Fractions, Decimals and Percents

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Fractions, Decimals and Percents What is a percent??? Percent : A ratio of a number to 100. The symbol % is used to indicate that a number is a percent . – PowerPoint PPT presentation

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Title: Fractions, Decimals and Percents


1
Fractions, Decimals and Percents
2
What is a percent???
  • Percent A ratio of a number to 100. The symbol
    is used to indicate that a number is a percent
    .
  • Example 40 is the ratio 40 to 100, or 40

  • 100
  • Percents can be written as fractions or decimals

3
Writing Percents as FractionsPearson Prentice
Hall Mathematics Video
  • Write 35 as a fraction in simplest form.
  • 35 35
  • 100
  • 7
  • 20
  • Write the percent as a fraction with a
    denominator of 100
  • Simplify

4
Writing Percents as Fractions
  • Write 88 as a fraction
  • 88 88
  • 100
  • 22
  • 25
  • Write the percent as a fraction with a
    denominator of 100
  • Simplify

5
Your Turn
  • Write 2 as a fraction

6
Your Turn
  • Write 45 as a fraction

7
Writing Percents as DecimalsPearson Prentice
Hall Mathematics Video
  • Write 43 as a decimal.
  • 43 43
  • 100
  • 0.43
  • 43 43. 0.43
  • Write the percent as a fraction with a
    denominator of 100.
  • Write the fraction as a decimal
  • All you have to do is move the decimal to the
    LEFT 2 times!

8
Writing Percents as Decimals
  • Write 105 as a decimal.
  • 105 105
  • 100
  • 1.05
  • 105 105. 1.05
  • Write the percent as a fraction with a
    denominator of 100.
  • Write the fraction as a decimal
  • All you have to do is move the decimal to the
    LEFT 2 times!

9
Your Turn
  • Write 16 as a decimal

10
Your Turn
  • Write 104 as a decimal

11
Writing Decimals as PercentsPearson Prentice
Hall Mathematics Video
  • Write 0.07 as a percent.
  • 0.07 7
  • 100
  • 7
  • 0.07 0.07 7
  • Write the decimal as a fraction
  • Write the fraction as a percent
  • All you have to do is move the decimal to the
    RIGHT 2 times!

12
Writing Decimals as Percents
  • Write 0.038 as a percent.
  • 0.038 38
  • 1000
  • 3.8
  • 0.038 0.038 3.8
  • Write the decimal as a fraction
  • Write the fraction as a percent
  • All you have to do is move the decimal to the
    RIGHT 2 times!

13
Your Turn
  • Write 0.57 as a percent

14
Your Turn
  • Write 0.2 as a percent

15
Writing Fractions as PercentsPearson Prentice
Hall Mathematics Video
  • Write 4 as a percent
  • 5
  • 4 4 20
  • 5 5 20
  • 80
  • 100
  • 80
  • Write an equivalent fraction with a denominator
    of 100.
  • Write the fraction as a percent

16
Writing Fractions as Percents
  • Write 3 as a percent
  • 8
  • 3 3 8
  • 8
  • 0.375
  • 37.5
  • Use division to write the fraction
  • Write the decimal as a percent

17
Your Turn
  • Write 3 as a fraction
  • 10

18
Your Turn
  • Write 11 as a fraction
  • 40
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