Appendix B: Algebraic Mode (ALG) 177
Percent Difference
To find the percent difference between two numbers:
1. Key in the base number.
2. Press } to separate the other number from the base number.
3. Key in the other number.
4. Press à.
Example: Yesterday your stock fell from 35.5 to 31.25 per share. What is the
percent change?
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 per-
centage of the total sales occurred in Europe?
Keystrokes (ALG mode) Display
35.5}
35.50
Keys in the base number and
separates it from the other number.
31.25
31.25
Keys in the other number.
à
11.97
Nearly a 12% decrease.
Keystrokes (ALG mode) Display
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.
