HP 20B manual

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Mathematical Calculations

To find a percentage of a given number, enter the number and multiply it by the desired percentage, followed by =. For example, to find 25% of 200, press 200*25%=to return a result of 50.

To add or subtract a percentage of a number, enter the first number, followed by +or -and the percentage followed by %. Finish your calculation with =. For example, to add 10% to 50, press 50+10%=to return a result of 55.

In RPN mode, the %key calculates x % of the number on Level 2 of the stack, when x is the number on Level 1 of the stack. It does not modify the number on Level 2 of the stack, and thus allows you to perform addition or subtraction after pressing %to add or subtract x % from the number.

For example, 200I25%returns 50, but 200 is still on Level 2 of the stack, and pressing - returns 150, or 200-25%.

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Contents HP part number F2219-90201 First edition August HP 20b Business Consultant Financial Calculator ManualRevision History Legal NoticesLegal Notices Revision HistoryContents Time Value of Money Business ProblemsCash Flows BondsIndex ErrorsWarranty, Regulatory, and Contact Information Feature Chapters FeatureHP 20b Business Consultant Keyboard Keyboard Map LegendAdjusting the Display Contrast Basic FeaturesBasic Features Selecting a LanguageTwo Line Display Mode Menu Setting PreferencesSetting top line Description Basic Features 1Mode Menu SettingsKeys Display Description Changing the Calculation ModeAnnunciators Key Presses and the Secondary Function Key= Key Using the I and = KeysI Key Memory and the Memory Menu Reset x MenuEditing and Clearing Entries On/CE O Key Accessing Menus and Menu Maps Menu Map for the Break-even Menu Number Entry and Display Mathematical CalculationsMathematical Functions Algebraic Mode Chain ModeRPN Stack Reverse Polish Notation RPN ModeO1c23 I56c1 Last NumberU3I 5I6+ 3I4+Mathematical Calculations 2Last Number RPN StackKeys Display Description RPN Stack RPN Stack and the Roll Down Operation One-Number Functions and the Math MenuKeys Description Math s MenuMenu Map for the Math Menu Ior = Probability Sub-menuMathematical Calculations 5Math Menu Example 10I Two-Number Functions10I 12I 7Inverse Probability ExampleStoring and Recalling Numbers Storing and Recalling with Time Value of Money TVM Keys Recall ArithmeticRecalling a Menu Item Value in a Menu Rounding NumbersPage Time Value of Money TVM Keys Time Value of MoneyTime Value of Money 1400 360 N00V Calculating Payments on a LoanMenu Item/Key Description AmortizationTime Value of Money 2TVM Example Creating an Amortization Schedule 10Y1400 00V Interest Conversion Menu Using the Interest Conversion MenuTime Value of Money 6Interest Rate Conversion Example Canadian Mortgages TVM Canada365 Page Canadian Mortgage Example O300N 6Y350 00VCash Flows Cash Flow DiagramCash Flow Amount Cash Flow ExampleKey Description 5000I 80004500I 4000ICash Flows 2Cash Flow Example 115000Analyzing Cash Flows IRR% NPV and IRR Menu ItemsCash Flows 4NPV and IRR Example Editing Cash FlowsSample Cash Flow Diagrams Bond Menu Bonds2020 2010Bond Calculation Example Bond Menu ItemsBonds 2Bond Calculation Example +L1=Date Calculation Example Date CalculationDate Calculation Menu Date Calculation 1Date Calculation Example 10.3 12010Break-even Menu Break-evenBreak-even 1Break-even Example Percent Calculation Menu Business Problems22I 15I20I 35I30I What is 30% of 80? 4Part % of Total Example80I Depreciation Menu DepreciationDepreciation Method Description Sline 1Depreciation Methods2Depreciation Menu Items 500 1000Depreciation Example Depreciation Menu ItemsDepreciation 3Straight Line Depreciation Example Menu Maps for the Data and Statistics Menus Statistical OperationsData and Stats Menus Menu Item Description Statistical Operations 1The Statistics Menu Items2I1 65I 1I1 50I3I1 60I 4I1 75IStatistical Operations 3Statistics Example 5I1 70I1Error Messages ErrorsError Messages and Calculator Status Error Message Status Replacing the Batteries Warranty, Regulatory, and Contact InformationHP Limited Hardware Warranty and Customer Care Customer Care Honduras Hong Kong 香港特別行政區 852 India 210 969+65 6100 Ireland 01 605 Italia 02 754 19495 228 877 23201 439 Singapore 6100Modifications Product Regulatory & Environment InformationCanadian Notice Avis CanadienChemical Substances Pbde Calendar Actual, Cal.360 IndexOff calculator off