Percent Difference - HP 12C Platinum Owner's Handbook Manual

28 Section 2: Percentage and Calendar Functions
the base amount inside after you calculate a percentage amount. To calculate a
net amount, simply calculate the percentage amount, then press = or -.
Example: You're buying a new car that lists for $13,250. The dealer offers you a
discount of 8%, and the sales tax is 6%. Find the amount the dealer is charging
you, then find the total cost to you, including tax.
Keystrokes (RPN mode)
13250\
8b
-
6b
=

Percent Difference

In RPN mode, 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.
If the other number is greater than the base number, the percent difference will
be positive. If the other number is less than the base number, the percent
difference will be negative. Therefore, a positive answer indicates an increase,
while a negative answer indicates a decrease.
If you are calculating a percent difference over time, the base number is typically
the amount occurring first.
Example: Yesterday your stock fell from 58˝ to 53Ľ per share. What is the
percent change?
Keystrokes
58.5\
53.25
à
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,
Display
13,250.00 Keys in the base amount and
separates it from the percentage.
Amount of discount.
1,060.00
12,190.00 Base amount less discount.
Amount of tax (on $12,190).
731.40
12,921.40 Total cost: base amount less
discount plus tax.
Display
Keys in the base number and
58.50
separates it from the other number.
Keys in the other number.
53.25
Nearly a 9% decrease.
–8.97