HP 12C, User Manual

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36 Section 2: Percentage and Calendar Functions
File name: HP 12cpt_user's guide_English_110608.DOC Page: 40 of 285
Printed Date: 2009/1/13 Dimension: 14.8 cm x 21 cm
To find what percentage a number is of a total, when you already know the total
number:
1. Key in the total number.
2. Press
\
to separate the other number from the total number.
3. Key in the number whose percentage equivalent you wish to find.
4. Press
Z
.
For example, if you already knew in the preceding example that the total sales
were $7.95 million and you wanted to find what percentage of that total occurred
in Europe:
Keystrokes
(RPN mode)
Display
7.95
\ 7.95
Keys in the total amount and
separates it from the next number.
2.36
2.36
Keys in 2.36 to find what % it is of
the number in the display.
Z
29.69
Europe had nearly 30% of the total
sales.
Percent of Total in ALG Mode
In ALG 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
(ALG 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 % it is of
the number in the display.
Z
29.69
Europe had nearly 30% of the total