Sec. 8.5

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Sec. 8.5

  1. 1. Learning Target:Students will learn how to write percents as decimals and fractions. <br />
  2. 2. Percent (%) is a ratio that compares a number to 100. The word percent means “per hundred” or “out of 100”<br />
  3. 3. To write a percent as a decimal:Divide the value by 100(Move your decimal two places to the left which will make the number smaller.)<br />
  4. 4. To write a percent as a fraction:Rewrite the percent using a denominator of 100.Simplify if possible.<br />
  5. 5. Write 70.3/100 in words and as a percent.<br />
  6. 6. Write 70.3/100 in words and as a percent.Words = Seventy and three tenths hundredthsPercent = 70.3%<br />
  7. 7. Write the number in words and as a percent. A. 7/100B. 0.38C. 32.5/100D. 4 or 400/100<br />
  8. 8. Write the number in words and as a percent. A. 7/100seven hundredths; 7%B. 0.38thirty-eight hundredths; 38%C. 32.5/100thirty-two and five tenths hundredths; 32.5%D. 4 or 400/100four hundred hundredths; 400%<br />
  9. 9. Write 30.7% as a fraction and as a decimal.<br />
  10. 10. Write 30.7% as a fraction and as a decimal.Fraction = 30.7/100Decimal = 0.307<br />
  11. 11. Write the percent as a decimal and a fraction.5%20%3.5%<br />
  12. 12. Write the percent as a decimal and a fraction.5%0.05; 5/100 = 1/2020%0.20; 20/100 = 1/53.5%0.035; 35/1000 = 7/200<br />
  13. 13. Nineteen out of 100 marbles are green. Write this ratio as a percent, a decimal and a fraction.Hint: You don’t have to find the % first. I like to start with the fraction first if the denominator is 100.<br />
  14. 14. Nineteen out of 100 marbles are green. Write this ratio as a percent, a decimal and a fraction.Fraction = 19/100Percent = 19%Decimal = 0.19<br />
  15. 15. Circle Graphs:The parts of a circle graph together represent a total of 100%.Example on pg. 426 example 4<br />
  16. 16. Can you write percents as decimals and fractions? <br />

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