Fractions, Decimals, And Percents


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Fractions, Decimals and Percents. Chapter 6, Section 4

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Fractions, Decimals, And Percents

  1. 1. Chapter 6, Section 4: Fractions, Decimals, and Percents <ul><li>Write each faction as a decimal. </li></ul><ul><li>5/8 </li></ul><ul><li>9/20 </li></ul><ul><li>¾ </li></ul><ul><li>5/6 </li></ul><ul><li>2/3 </li></ul><ul><li>8/11 </li></ul><ul><li>0.625 </li></ul><ul><li>0.45 </li></ul><ul><li>0.75 </li></ul><ul><li>0.833333 </li></ul><ul><li>0.66666 </li></ul><ul><li>0.72727272727272 </li></ul>
  2. 2. Percent <ul><li>A PERCENT is a Ratio that Compares a number to 100. </li></ul><ul><li>Therefore, you can write a percent as a fraction with a denominator of 100. </li></ul><ul><li>If you can write it as a fraction, it means you can write it as a ratio, decimal, and percent as well. </li></ul>
  3. 3. Write as a fraction or mixed number in Simplest Form. <ul><li>5% </li></ul><ul><li>58% </li></ul><ul><li>144% </li></ul><ul><li>72% </li></ul>1 st : Write as the % over 100 (#/100) 2 nd : Simplify. Check answers with Ms. D-H.
  4. 4. Percent  Decimal <ul><li>Write the Percent as a Fraction, with a denominator of 100, then Divide. </li></ul><ul><li>Remember Top Number goes in the House. </li></ul><ul><li>Bottom Number goes outside of the House. </li></ul>
  5. 5. Try This: Percent  Decimal <ul><li>9.7 % </li></ul><ul><li>1 st : Don’t let the decimal percent phase you. </li></ul><ul><li>2 nd : Put 9.7 over 100 to make a fraction. </li></ul><ul><li>3 rd : Divide 9.7 by 100. </li></ul><ul><li>4 th : your answer is 0.097 </li></ul>
  6. 6. Try These, Percent  Decimal <ul><li>16% </li></ul><ul><li>62.5% </li></ul><ul><li>120% </li></ul>Check answers with Ms. D-H.
  7. 7. Word Problem Alert <ul><li>About 45% of the people in the United States have type O blood. Express this percent as a decimal and as a fraction in simplest form. </li></ul>Check answers with Ms. D-H.
  8. 8. Decimal  Percent <ul><li>1 st : Rewrite Decimal as a Fraction, with a denominator of 100. </li></ul><ul><li>2 nd : Write the fraction as a percent. </li></ul><ul><li>OR </li></ul><ul><li>Move the decimal point two places to the right and add a percent sign! </li></ul>
  9. 9. Try These: Use the First Method, Check your Answer with the Second Method: Decimal  Percent <ul><li>0.333 </li></ul><ul><li>0.023 </li></ul><ul><li>1.75 </li></ul>Check answers with Ms. D-H.
  10. 10. Fraction  Percent <ul><li>1 st : Divide the numerator by the denominator. </li></ul><ul><li>2 nd : Turn the Decimal quotient into a percent (using either of the previous two methods). </li></ul>
  11. 11. Try This: <ul><li>Five out of sixteen families in the Argentina own Penguins. What percent of families own Penguins? </li></ul><ul><li>1 st : Write as a fraction. </li></ul><ul><li>2 nd : Divide the numerator by the denominator. </li></ul><ul><li>3 rd : Write as a percent. </li></ul>
  12. 12. Try This One Too: <ul><li>Three out of eleven families in Argentina own Tarantulas. To the nearest percent, what percent of families own Tarantulas? </li></ul>27%
  13. 13. Assignment #21 <ul><li>Practice 6-4 </li></ul><ul><li>, code: awe-0604 </li></ul>