Casio CFX-9850G PLUS, User'S Manual & Technical Reference

Page: 355 / 486

327
n
PMT =
–
PV
+
FV
PMT
n =
–
PV
+
FV
• A deposit is indicated by a plus sign (+), while a withdrawal is indicated by a
minus sign (–).
u u u u u
Converting between the nominal interest rate and effective
interest rate
The nominal interest rate (
I
% value input by user) is converted to an effective
interest rate (
I
%') when the number of installments per year (
P/Y
) is different from
the number of compound interest calculation periods (
C/Y
). This conversion is
required for installment savings accounts, loan repayments, etc.
I%' =
I%
(1+ ) –1
[
C / Y ]
[
P
/
Y
]
100
× [
C
/
Y
]
{ }
×
100
P/Y
: installment
periods per year
C/Y
: compounding
periods per year
When calculating
n
,
PV
,
PMT
,
FV
The following calculation is performed after conversion from the nominal interest
rate to the effective interest rate, and the result is used for all subsequent
calculations.
i = I%'
÷
100
When calculating
I
%
After
I
% is obtained, the following calculation is performed to convert to
I
%'.
I%' =
I%
(1+ ) –1
[
C
/
Y
]
[
P
/
Y
]
100
{ }
× [
C
/
Y
] ×
100
P/Y
: installment
periods per year
C/Y
: compounding
periods per year
The value of
I
%' is returned as the result of the
I
% calculation.
Press
2
(CMPD) in the Financial 1 screen to display the input screen for
compound interest calculation.
n
..................... number of compound periods
I
% ................... annual interest rate
PV
.................. present value (loan amount in case of loan; principal in case
of savings)
Compound Interest Calculations
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