Mathematical Calculations

To find a percentage of a given number, enter the number and multiply it by the desired percentage, followed by =. 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 -and the percentage followed by %. Finish your calculation with =. For example, to add 10% to 50, press 50+10%=to return a result of 55.

In RPN mode, the %key calculates x % of the number on Level 2 of the stack, when x is the number on Level 1 of the stack. It does not modify the number on Level 2 of the stack, and thus allows you to perform addition or subtraction after pressing %to add or subtract x % from the number.

For example, 200I25%returns 50, but 200 is still on Level 2 of the stack, and pressing - returns 150, or 200-25%.

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