Windows sets default display rules for numbers which are automatically used for all your programs. For example, when entering numbers in Excel the program may automatically uses commas to separate the thousand figures. Some countries use commas to separate decimal points, so you may need to change the formats for displaying numbers.
Here is how to change the default number formats in Windows:
Step One. Open Control Panel and select “Clock, Language and Region”:
Step Two. In the new screen under “Region”, select “Change date, time or number formats”:
Step Three. In the new window, click on “Additional settings”:
Step Four. Under the “Numbers” tab, click to select the default “Decimal symbol”, as well as the default “Digit grouping symbol”:
Click “OK” and the changes to the way numbers are displayed in Excel and all other windows programs will be implemented.