Specifies the decimal pattern. Reserved pattern letters are listed below:
| Symbol | Description |
| 0 | digit (If no value found, set to zero) |
| # | digit (If no value found, not set) |
| . | digit delimiter |
| , | group delimiter |
| E | separates mantissa and exponent in scientific notation |
| ; | separates positive and negative sub patterns |
| - | default negative prefix |
| % | multiply by 100 and show as percentage |
| X | other arbitrary characters can be placed at the front or end of the decimal |
| ' | used to quote reserved pattern letters in the prefix or suffix; for example, "'#'#" formats 123 to "#123" |