# Section 2: Percentage And Calendar Functions; Percentage Functions; Percentages; Net Amount - HP 12C Platinum Owner's Handbook Manual

And problem-solving guide.

Percentage and Calendar

### 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:
Keystrokes (RPN mode)
300
\
14
b
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
Section 2
Functions
Display
Keys in the base number.
300.
Pressing \ separates the next
300.00
number entered from the first
number, just as when an ordinary
arithmetic calculation is performed.
Keys in the percentage.
14.
Calculates the amount.
42.00
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