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File name: hp 12c pt_user's guide_English_HDPMF123E27 Page: 250 of 275
Printed Date: 2005/8/1 Dimension: 14.8 cm x 21 cm
Appendix E
Formulas Used
Percentage
100
)Rate()Base(
%
xy ×
=
⎟
⎟
⎠
⎞
⎜
⎜
⎝
⎛
−
=∆
)Base(
)Base()NewAmount(
100%
y
yx
⎟
⎟
⎠
⎞
⎜
⎜
⎝
⎛
=
)Total(
)Amount(
100%T
y
x
Interest
n = number of compounding periods.
i = periodic interest rate, expressed as a decimal.
PV = present value.
FV = future value or balance.
PMT = periodic payment.
S = payment mode factor (0 or 1) indicating treatment of PMT.
0 corresponds to End, 1 to Begin.
I = interest amount.
INTG (n) = integer portion of n.
FRAC (n) = fractional portion of n.
Simple Interest
iPV
n
I ××=
360
360
iPV
n
I ××=
365
365