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Is your HP12C or HP12C platinum showing a comma where the decimal point should be?

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If so, you can set it back to a decimal point by doing the following:

  1. Turn the calculator off.
  2. Press and hold down the decimal point key.
  3. While still holding the decimal point key down, turn the calculator on.
  4. Release both keys.

That's it! Doing this will switch the display between the US standard (commas for thousands and dot for decimal point) and the format used in other parts of the world (dots for thousands and a comma for the decimal indicator).

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