(11C) TVM for Interest Rates Solutions - Printable Version +- HP Forums (https://www.hpmuseum.org/forum) +-- Forum: HP Software Libraries (/forum-10.html) +--- Forum: General Software Library (/forum-13.html) +--- Thread: (11C) TVM for Interest Rates Solutions (/thread-14528.html) |
(11C) TVM for Interest Rates Solutions - Gamo - 02-18-2020 06:51 AM This Interest Rate Solver solutions is based on program provided by HP-55 Mathematics Programs handbook. Procedure: Input n (Periods in days, month or year) [A] // This step must be enter for all problem below Use PV and PMT: Input PV [ENTER] PMT [B] display interest rate in percent Use FV and PMT: Input FV [ENTER] PMT [C] display interest rate in percent Use PV and FV: Input FV [ENTER] PV [D] display interest rate in percent Solve for PMT: Input Interest [E] input PV [R/S] display Payment amount ---------------------------------------------- Example: USER FIX 2 "Payment Method is Ordinary Annuities (End Mode)" n, PV/PMT for 12, 5000/500 12 [A] 5000 [ENTER] 500 [B] display brieftly the suggest guess 3.06 then 2.92% n, FV/PMT for 12, 5000/400 12 [A] 5000 [ENTER] 400 [C] display brieftly the suggest guess 0.75 then 0.74% n, FV, PV for 60, 3000/2000 60 [A] 3000 [ENTER] 2000 [D] no guess needed then answer 0.68% n, i, PV for 180, 6%, 200000 180 [A] 6 [E] display 0.01 Input 200000 [R/S] display payment answer 1687.71 ------------------------------------------- Program: Code:
Remark: Problem from Labels [B] and [C] use the Suggested Guess to find Interest Rate from HP-55 handbook. Label [B] for PV/PMT used this formula for suggested guess [1 / (PV / PMT)] - [(1 / n^2) x (PV / PMT)] Lable [C] for FV/PMT used this formula for suggested guess [((FV/PMT) - n) x 2] ÷ [(n - 1)^2 + (FV/PMT)] Gamo 2/2020 |