The Percent Key; The Mathematical Functions - HP 17BIIPLUS Owner's Manual

Note that you must include a
imply multiplication.
v

The Percent Key

The % key has two functions:
Finding a Percentage. In most cases,
The one exception is when a plus or minus sign precedes the number.
(See "Adding or Subtracting a Percentage," below.)
For instance, 25
To find 25% of 200, press: 200
Adding or Subtracting a Percentage. You can do this all in one
calculation:
For instance, to decrease 200 by 25%, just enter 200
(Result is #.(&(( .)
Example: Calculating Simple Interest. 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?
Keys:
1250 7
+ %
=

The Mathematical Functions

Some of the math functions appear on the keyboard; others are in the
MATH menu. Math functions act on the last number in the display.
40 2: Arithmetic
* for multiplication; parentheses do not
% results in (&$. .
25
*
Display:
#K$.(&(()*-&.("
#K%%-&.("
% divides a number by 100.
. (Result is .(&(( .)
% =
-
Description:
Interest on the loan is
$87.50.
You must repay this
amount at the end of one
year.
25 .
% =