..When you change the width of a column to a fractional number, the column width may be set to a different number depending on the font used in the Normal style. For example, with a Normal style font of Arial, if you attempt to change the width of a column to 8.5, the column is set to 8.57 or 65 pixels. This behavior occurs because of the translation of font characters to pixel units.
Fractional pixel units cannot be displayed; therefore, the column width rounds to the nearest number that results in a whole pixel unit.
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