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242 Appendix B: Algebraic Mode (ALG)
File name: hp 12c pt_user's guide_English_HDPMF123E27 Page: 242 of 275
Printed Date: 2005/8/1 Dimension: 14.8 cm x 21 cm
Percent of Total
To calculate what percentage one number is of another:
1. Calculate the total amount by adding all individual amounts.
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
OO
0.00
Clears any pending operations.
3.92
+
3.92
Keys in the first number.
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 out what
percentage it is of the number in
the display.
Z
29.69
Europe had nearly 30% of the total
sales.
The Power Function
Pressing
q
calculates a power of a number, that is, y
x
. Like the arithmetic function
+
,
q
requires two numbers:
1. Key in the base number (which is designated by the y on the key).
2. Press q and key in the exponent (which is designated by the x on the key)
3. Press } to calculate the power.
Don’t forget to press
OO
if you are unsure if there are any pending
operations.
To Calculate
Keystrokes
(ALG mode)
Display
2
1.4
2
q
1.4
}
2.64
2
–1.4
2
q
1.4
Þ}
0.38
(–2)
3
2
Þq
3
}
–8.00
3
2
or 2
1/3
2
q
3
y}
1.26