HP 12C, Руководство пользователя

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Section 2: Percentage and Calendar Functions 35
File name: HP 12cpt_user's guide_English_110608.DOC Page: 39 of 285
Printed Date: 2009/1/13 Dimension: 14.8 cm x 21 cm
Percent of Total in RPN Mode
In RPN mode, to calculate what percentage one number is of another:
1. Calculate the total amount by adding the individual amounts, just as in a
chain arithmetic calculation.
2. Key in the number whose percentage equivalent you wish to find.
3. Press
Z
.
Example: Last month, your company posted sales of $3.92 million in the U.S.,
$2.36 million in Europe, and $1.67 million in the rest of the world. What
percentage of the total sales occurred in Europe
?
Keystrokes
(RPN mode)
Display
3.92
\ 3.92
Keys in the first number and
separates it from the second.
2.36
+ 6.28
Adds the second number.
1.67
+ 7.95
Adds the third number to get the
total.
2.36
2.36
Keys in 2.36 to find what percentage
it is of the number in the display.
Z
29.69
Europe had nearly 30% of the total
sales.
In RPN mode, the hp 12c platinum holds the total amount inside after a percent of
total is calculated. Therefore, to calculate what percentage another amount is of
the total:
1. Clear the display by pressing
O
.
2. Key in that amount.
3. Press
Z
again.
For example, to calculate what percent of the total sales in the preceding example
occurred in the U.S. and what percent occurred in the rest of the world:
Keystrokes
(RPN mode)
Display
O
3.92
Z 49.31
The U.S. had about 49% of the total
sales.
O
1.67
Z 21.01
The rest of the world had about 21%
of the total sales.