Math Success - Percents and Ratios

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1、PercentsandRatiosmathSUCCESSLucilleCaronPhilipM.St.JacquesCopyright©2000byLucilleCaronandPhilipM.St.JacquesAllrightsreserved.Nopartofthisbookmaybereproducedbyanymeanswithoutthewrittenpermissionofthepublisher.LibraryofCongressCataloging-in-PublicationData

2、Caron,Lucille.Percentsandratios/LucilleCaronandPhilipM.St.Jacques.p.cm.—(Mathsuccess)Includesbibliographicalreferencesandindex.Summary:Explainsthemeaningsofpercentsandratios,discussescalculationtechniques,andincludesmanyexamples.ISBN0-7660-1435-51.Ratioa

3、ndproportion—Juvenileliterature.2.Percentage—Juvenileliterature.[1.Ratioandproportion.2.Percentage.]I.St.Jacques,PhilipM.II.Title.III.Series.QA117.P3952000513.2’4—dc2100-008160PrintedintheUnitedStatesofAmerica10987654321ToOurReaders:AllInternetaddressesi

4、nthisbookwereactiveandappropriatewhenwewenttopress.Anycommentsorsuggestionscanbesentbye-mailtoComments@enslow.comortotheaddressonthebackcover.CoverIllustration:©CorelCorporation(background).ContentsIntroduction..............................5Ratios1.TheMe

5、aningofRatios.....................62.ReducingRatios...........................83.RatiosandPercents........................104.EquivalentRatios..........................125.Rates...................................146.UnitsofMeasure........................

6、..167.RatiosandFractions.......................188.RatiosandDecimals.......................209.UnitPricing..............................2210.RatioandProportion.......................2411.FindingaNumberWhenaRatioIsKnown.....2612.ScaleDrawings.............

7、..............2813.TheGoldenRectangle......................3014.Probability...............................32Percents15.TheMeaningofPercents....................3416.PercentsandRatios........................3617.DecimalEquivalents.......................381

8、8.FractionEquivalents.......................4019.MixedNumerals..........................4220.FindingthePercentofaNumber.............4421.ApplyingPercent:PartandWhole............4622.FindingtheTotalNumber...................