Wolfram Demonstrations Projecthttp://demonstrations.wolfram.com/An Open Resource of Interactive Mathematica VisualizationsCopyright 2009 Wolfram Demonstrations Project & ContributorsPie Chartshttp://demonstrations.wolfram.com/PieCharts/]]>http://demonstrations.wolfram.com/PieCharts/Tip Calculatorhttp://demonstrations.wolfram.com/TipCalculator/]]>http://demonstrations.wolfram.com/TipCalculator/Proportional Quantitieshttp://demonstrations.wolfram.com/ProportionalQuantities/]]>http://demonstrations.wolfram.com/ProportionalQuantities/Sales Tax and Discountshttp://demonstrations.wolfram.com/SalesTaxAndDiscounts/]]>http://demonstrations.wolfram.com/SalesTaxAndDiscounts/Calculating Your Gradehttp://demonstrations.wolfram.com/CalculatingYourGrade/]]>http://demonstrations.wolfram.com/CalculatingYourGrade/Percentage Changehttp://demonstrations.wolfram.com/PercentageChange/]]>http://demonstrations.wolfram.com/PercentageChange/Changing Proportions into Percentshttp://demonstrations.wolfram.com/ChangingProportionsIntoPercents/]]>http://demonstrations.wolfram.com/ChangingProportionsIntoPercents/Percent of a Numberhttp://demonstrations.wolfram.com/PercentOfANumber/]]>http://demonstrations.wolfram.com/PercentOfANumber/Volume Units of Measurementhttp://demonstrations.wolfram.com/VolumeUnitsOfMeasurement/]]>http://demonstrations.wolfram.com/VolumeUnitsOfMeasurement/Estimating Percentageshttp://demonstrations.wolfram.com/EstimatingPercentages/]]>http://demonstrations.wolfram.com/EstimatingPercentages/Finding a Pattern (Linear Equations)http://demonstrations.wolfram.com/FindingAPatternLinearEquations/]]>http://demonstrations.wolfram.com/FindingAPatternLinearEquations/Two Trains Puzzlehttp://demonstrations.wolfram.com/TwoTrainsPuzzle/]]>http://demonstrations.wolfram.com/TwoTrainsPuzzle/