1 / 12

Percentages

Percentages. or Fractions Disguised by a Latin Name. A short review…. Per Something. “per something” means “divided by something” Such as $3.25 per gallon , or $.99 per pound , or 25 miles per hour , or 8 ¢ per kilowatt-hour , and can be expressed as. Latin per cent.

Download Presentation

Percentages

An Image/Link below is provided (as is) to download presentation Download Policy: Content on the Website is provided to you AS IS for your information and personal use and may not be sold / licensed / shared on other websites without getting consent from its author. Content is provided to you AS IS for your information and personal use only. Download presentation by click this link. While downloading, if for some reason you are not able to download a presentation, the publisher may have deleted the file from their server. During download, if you can't get a presentation, the file might be deleted by the publisher.

E N D

Presentation Transcript


  1. Percentages or Fractions Disguised by a Latin Name epw 10/9/06

  2. A short review… epw 10/9/06

  3. Per Something • “per something” means • “divided by something” • Such as $3.25 per gallon, or • $.99 per pound, or • 25 miles per hour, or • 8¢per kilowatt-hour, and can be expressed as epw 10/9/06

  4. Latin per cent • per cent means “per one hundred” • which is “divided by 100” • We use the symbol % as a shorthand for the words per cent • We read 50% as “50 percent” and it means epw 10/9/06

  5. The Big P • For a number P epw 10/9/06

  6. Examples epw 10/9/06

  7. Examples (cont.) = 15 epw 10/9/06

  8. Conversions(those pesky conversions, again! ) • Percentage to a common fraction • Replace % symbol with division by 100 • Simplify the fraction if necessary epw 10/9/06

  9. Conversions (cont.) • Convert a percentage to a decimal • Drop the % symbol and move the decimal point two places to the left epw 10/9/06

  10. Conversions (cont.) • Convert a decimal to a percentage • Move the decimal point two places to the right (adding a zero if necessary), and • Add the % symbol 0.43 = 43% 0.7 = 70% 0.0043 = 0.43% epw 10/9/06

  11. Conversions (cont.) • Convert a common fraction to a percentage • Convert the fraction to decimal form, then • Convert the decimal to a percentage epw 10/9/06

  12. The End! epw 10/9/06

More Related