Use the number format to format the display of a number’s decimal places, thousands separator, and negative values.
Select the cell or cells.
Click Inspector in the toolbar, and then click the Table button.
In the Table inspector, click Format.
Choose Number from the Cell Format pop-up menu.
To specify how many decimal places to display, use the Decimals field. If a value contains more decimal places than you specify, the decimal value displayed is rounded, not truncated. For example, if a cell is formatted to display two decimal places, the value 3.456 is displayed as 3.46, not 3.45.
To specify how to display negative values, choose an entry from the pop-up menu adjacent to the Decimals field.
To specify whether to use a thousands separator, select or deselect Thousands Separator.
To learn about other cell format types, see Formatting Table Cell Values for Display.