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HP HP-12c Manual

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Section 2
Percentage and Calendar
Functions
Percentage Functions
The HP 12C Platinum includes three keys for solving percentage problems: b,
à, and Z. You don’t need to convert percentages to their decimal
equivalents; this is done automatically when you press any of these keys. Thus,
4% need not be changed to 0.04; you key it in the way you see and say it: 4b.
Percentages
In RPN mode, to find the amount corresponding to a percentage of a number:
1. Key in the base number.
2. Press \.
3. Key in the percentage.
4. Press b.
For example, to find 14% of $300:
If the base number is already in the display as a result of a previous calculation,
you should not press \ before keying in the percentage – just as in a chain
arithmetic calculation.
Net amount
A net amount – that is, the base amount plus or minus the percentage amount –
can be calculated easily with your HP 12C Platinum, since the calculator holds
Keystrokes (RPN mode) Display
300
300.
Keys in the base number.
\
300.00
Pressing \ separates the next
number entered from the first
number, just as when an ordinary
arithmetic calculation is performed.
14
14.
Keys in the percentage.
b
42.00
Calculates the amount.
… 27 …


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