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Fractions, Decimals and Percents

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 . Example : 40% is the ratio 40 to 100, or 40 100

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Fractions, Decimals and Percents

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  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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