PercentageApplications<br />GeneralitiesaboutPercentage<br />
What does percentage mean?<br />	In mathematics, a percentage is a way of expressing a number as a fraction of 100 (per ce...
Why are percentages necessary?<br />It allows us to better visualize how much of a whole is being represented also is impo...
When do we add a percentage?<br />Weadd a percentagewhentheprice of anitem at a shop has tax.<br />Anotherexample of added...
When do we subtract a percentage?<br />Thefirstsituationwouldbewhenanitem in a shop has a discount.<br />Anotherinstanceco...
How do wefindthepercentof anamount?<br />Exercise: findthe 17% of $65<br />Steps: <br />Changethepercentto decimal : 17% =...
Addingpercents<br />Sometimeswehavetopaytaxes.<br />Example: I am goingtobuy a sweater whose regular priceis $65. Butit ha...
Applydiscountpercent<br />	Once youhavefoundthepercent of anamount, yousubtractitfromthe original price, ifthesituationcal...
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Power point percentages

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Power point percentages

  1. 1. PercentageApplications<br />GeneralitiesaboutPercentage<br />
  2. 2. What does percentage mean?<br /> In mathematics, a percentage is a way of expressing a number as a fraction of 100 (per cent meaning "per hundred". It is often denoted using the percent sign, "%". For example, 45%) read as "forty five percent" is equal to 45 / 100, or 0.45.<br />
  3. 3. Why are percentages necessary?<br />It allows us to better visualize how much of a whole is being represented also is important for other things such as finance and interest rates.<br />Shops advertise discounts on products.  These discounts are percentages."Up to 50% off marked prices“<br />Financial institutions quote interest charged to the client on loans, or interest paid for money invested, as a percentage.<br />"Housing Loans-4.95% p.a. for the first 12 months"Interest paid may be as Simple Interest or Compound Interest.<br />Companies describe their success or failure as an increase or decrease in profit levels."C-Company profit down by 15% for the last financial year“<br />A salesperson may be given a commission as payment for selling goods.  The commission can be a percentage of the sales made.<br />"Position Vacant:  20% commission on all sales to the successful applicant.“<br />Articles such as antiques or jewelery may increase in value as time goes by-appreciation.<br />Items such as equipment and machinery usually decrease in value-depreciation<br />
  4. 4. When do we add a percentage?<br />Weadd a percentagewhentheprice of anitem at a shop has tax.<br />Anotherexample of addedpercentagesiswhen at a restaurant a certainamountispaid as a tip.<br />A thirdsituationwouldbewhenanamount has increasedover a period of time: forexample , theprice of anitem, theminimumwageorthepopulation of a country fromoneyeartoanother.<br />
  5. 5. When do we subtract a percentage?<br />Thefirstsituationwouldbewhenanitem in a shop has a discount.<br />Anotherinstancecouldbewhenwewanttoknowthe original price of anitemwhich has a taxonit.<br />
  6. 6. How do wefindthepercentof anamount?<br />Exercise: findthe 17% of $65<br />Steps: <br />Changethepercentto decimal : 17% = 0.17<br />Multiplytheamountbythe decimal : 65x0.17<br />Theproductisthe 17% of 65.<br />65x0.17 = 11.05<br />
  7. 7. Addingpercents<br />Sometimeswehavetopaytaxes.<br />Example: I am goingtobuy a sweater whose regular priceis $65. Butit has a tax of 17%.<br /> In this case, wehavetoaddthepercent.<br />Sincewealreadyknowthat 17% of 65 is 11.05, theonlystep I havetofollownowistoaddthislastamounttothe original price:<br />65+11.05 = 76.05 <br />Thelastamountisthe total price I havetopayforthecoat: $76.05<br />
  8. 8. Applydiscountpercent<br /> Once youhavefoundthepercent of anamount, yousubtractitfromthe original price, ifthesituationcallsfor a discount.<br />Example: I am goingtobuy a coatwhose regular priceis $65, buton sale it has a discount of 17%. Howmuch do I havetopay?<br />Steps:<br />I alreadyknowthat the17% of 65 is = 11.05<br />Now I subtractitfromthe original price: 65 – 11.05=53.95<br />Thedifference: $53.95 isthe final amount I am goingtopay.<br />

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