Calculating Amortization; Calculating Interest Conversion - Texas Instruments TI-89 Software Manual

Calculating Amortization

Use the amortization functions (
of interest for an amortization schedule.
Catalog Variables/ Arguments
npmt [, roundvalue ]
bal(
PMT1 , PMT2 [, roundvalue ]
Int(
PMT1 , PMT2 ,[, roundvalue ]
Prn(
¦
npmt is the number of the payment at which you want to calculate a balance. It must be a
positive integer < 10,000.
¦
roundvalue specifies the internal precision the calculator uses to calculate the balance. If
you do not specify roundvalue, then the calculator uses
¦
PMT1 is the starting payment. PMT2 is the ending payment in the range. PMT1 and PMT2
must be positive integers < 10,000.
¦
To display
Note: You must enter values for

Calculating Interest Conversion

Use the interest conversion functions to convert interest rates from an annual effective rate to
a nominal rate,
Catalog Variables/ Arguments
effective_rate , compounding_periods
nom(
nominal_rate , compounding_periods
eff(
¦
effective rate must be a real number.
¦
nominal rate must be a real number.
¦
compounding periods must be a real number > 0.
Finance Application for the TI-89 / TI-92 Plus
,
bal GPrn
)
)
)
on the homescreen, press ¥ and c at the same time, and then press ¤
G
, , and
I PV
4Nom , or from a nominal rate to an annual effective rate,
, ) to calculate balance, sum of principal, and sum
GPrn
Definition (for an amortization schedule)
Schedule balance; based on stored values
for , , ,
I PV PMT PpY
The sum of the interest during a specified
period. Based on stored values for
, , and
PMT PpY CpY
Sum of the principle during a specified
period; based on stored values for
, , and
PMT PpY CpY
Float 2
before computing the principal.
PMT
Definition
Computes the nominal interest rate.
)
Computes the effective interest rate.
)
, and .
CpY
, ,
I PV
.
, ,
I PV
.
decimal-mode setting.
S
4Eff .
.
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