HP 12C Financial calculator - Manual (Page 28)

28 Section 2: Percentage and Calendar Functions
File name: hp 12c_user's guide_English_HDPMBF12E44 Page: 28 of 209
Printered Date: 2005/7/29 Dimension: 14.8 cm x 21 cm
The à key can be used for calculations of the percent difference between a
wholesale cost and a retail cost. If the base number entered is the wholesale cost,
the percent difference is called the markup; if the base number entered is the retail
cost, the percent difference is called the margin. Examples of markup and margin
calculations are included in the hp 12c Solutions Handbook.
Percent of Total
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 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.
The hp 12c 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 Display
O3.92Z 49.31 The U.S. had about 49% of the total
sales.
O1.67 Z 21.01 The rest of the world had about 21%
of the total sales.