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Section 2: Percentage and Calendar Functions 33
File name: hp 12c pt_user's guide_English_HDPMF123E27 Page: 33 of 275
Printed Date: 2005/8/1 Dimension: 14.8 cm x 21 cm
Net Amount in RPN Mode
A net amount — that is, the base amount plus or minus the percentage amount —
can be calculated easily with your hp 12c platinum, since the calculator holds the
base amount inside after you calculate a percentage amount. To calculate a net
amount, simply calculate the percentage amount, then press
=
or
-
.
Example:
You’re buying a new car that lists for $23,250. The dealer offers you
a discount of 8%, and the sales tax is 6%. Find the amount the dealer is charging
you, then find the total cost to you, including tax.
Keystrokes
(RPN mode)
Display
23250
\
23,250.00
Keys in the base amount and
separates it from the percentage.
8
b
1,860.00
Amount of discount.
-
21,390.00
Base amount less discount.
6
b
1,283.40
Amount of tax (on $21,390).
=
22,673.40
Total cost: base amount less discount
plus tax.
Net Amount in ALG Mode
In ALG mode, you can calculate a net amount all in one calculation:
For example, to decrease 200 by 25%, just enter 200
-
25
b}
. (Result is 150.)
Example:
You borrow $1,250 from a relative, and agree to repay the loan in a
year with 7% simple interest. How much money will you owe
?
Keystrokes
(ALG mode)
Display
1250
+
7
b
87.50
Interest on the loan is $87.50.
}
1,337.50
You owe this amount at the end of
one year.
Example:
You’re buying a new car that lists for $23,250. The dealer offers you
a discount of 8%, and the sales tax is 6%. Find the amount the dealer is charging
you, then find the total cost to you, including tax.
Keystrokes
(ALG mode)
Display
23250
-
23,250.00
Keys in the base amount and
prepares to subtract the discount
percentage.