Calculate manually with RPN calculator

10312019, 05:13 AM
(This post was last modified: 10312019 06:29 AM by Gamo.)
Post: #8




RE: Calculate manually with RPN calculator
Manually calculate the Interest Rate for an Annuity.
Formula use to solve for [ i ] the interest rate when these three variables are known. n  Period PV  Present Value PMT  Payment f(i) = (PMT ÷ PV) + [ i ÷ 1  (1+i)^n ] ——————————————————— Steps: FIX 4 Setup: n [STO] 0 PMT [ENTER] PV [÷] [ENTER] [ENTER] [ENTER] [.] 1 Iterations: [ENTER] [ENTER] 1 [+] [RCL] 0 [Y^X] 1 [] [÷] [] ——————————————————— Example: n = 25, PV = 2000, PMT = 203.61, i = ? Using HP12C result is 8.9998 or i = 9% On the original HP12C when calculate step to [Y^X] the screen will turn blank momentary. and resume normal operation. Calculate Manually: 25 [STO] 0 203.61 [ENTER] 2000 [÷] display 0.1018 [ENTER] [ENTER] [ENTER] . 1 [ENTER] [ENTER] 1 [+] [RCL] 0 [Y^X] 1 [] [÷] [] display 0.0916 [ENTER] [ENTER] 1 [+] [RCL] 0 [Y^X] 1 [] [÷] [] display 0.0903 [ENTER] [ENTER] 1 [+] [RCL] 0 [Y^X] 1 [] [÷] [] display 0.0900 [ENTER] [ENTER] 1 [+] [RCL] 0 [Y^X] 1 [] [÷] [] display 0.0900 Last two iterations got the same value based on 4 decimal places. [EEX] 2 [x] display 9 Answer: 9% ——————————————————————————— Note: The [.] 1 is a guess Hint: For higher decimal place accuracy simply do more iterations. ——————————————————————————— Gamo 

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Messages In This Thread 
Calculate manually with RPN calculator  Gamo  10302019, 04:53 AM
RE: Calculate manually with RPN calculator  Gamo  10302019, 05:52 AM
RE: Calculate manually with RPN calculator  Dave Britten  10302019, 10:32 AM
RE: Calculate manually with RPN calculator  Gamo  10302019, 10:50 AM
RE: Calculate manually with RPN calculator  SlideRule  10302019, 11:38 AM
RE: Calculate manually with RPN calculator  PedroLeiva  10302019, 01:32 PM
RE: Calculate manually with RPN calculator  SlideRule  10302019, 01:54 PM
RE: Calculate manually with RPN calculator  Gamo  10312019 05:13 AM
RE: Calculate manually with RPN calculator  Stevetuc  11022019, 07:46 AM
RE: Calculate manually with RPN calculator  Felix Gross  10312019, 07:17 AM

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