HP 20b Consultant Financial manual Simple Percentages

Mathematical Calculations

Note: the FIX= setting only affects the display; it does not affect the actual numbers.

Simple Percentages

In Algebraic or Chain modes, pressing %divides a number by 100. For example, pressing 25%returns 0.25.

To find a percentage of a given number, enter the number and multiply it by the

desired percentage, followed by =to return the result. For example, to find 25% of 200, press 200*25%=to return a result of

50.

To add or subtract a percentage of a number, enter the first number, followed by

+or -the percentage, followed by %. Finish your calculation with

=, if desired. For example, to add 10% to 50, press 50+10%=to return a result of 55.

In RPN mode, the %key calculates x percent of the number on level two of the stack, when x is the number on level one of the stack. It does not modify the number on level two of the stack, allowing you to perform an addition or a subtraction after pressing %to add or subtract x %from the number.

For example, 200I25%returns 50, but 200 is still on level two of the stack, and pressing -returns 150, or 200-25%, with the (-) annunciator displayed on the top line.

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