HP -18C Owner's Manual page 50

2. Store each of the values you know by keying in the number and
pressing the appropriate menu key.
3. Press the menu key for the value you want to calculate. The an-
swer is displayed in the calculator line.
Example: Calculating the percent change. Part 1. Total sales last
year were $110,000. This year, sales were $115,000. What is the per-
cent change between last year's sales and this year's?
Part 2. What would this year's sales have to be to show a 12% in-
crease from last year?
Starting from the MAIN menu:
Keys: Display:
. , CLEAR ALL
I
0.00
110000
IIDIII
OLD= 110,000.00
115000 "
NE~~=115 ,
000.00
IEmII
%CHANGE=4.55
Description:
Displays the
%CHG
menu.
Clears the history stack
and the
%CHG
variables.
Stores 110,000 in OLD.
Stores 115,000 in NEW.
Calculates the percent
change.
Part 2: OLD remains 110,000, so you don't have to key it in again.
12 1Em11
..
:~CHANGE= 12.00
NEW=123,200.00
48 3: General Business Calculations
Stores 12 in %CH.
Calculates the value 12%
greater than 110,000.