5. Are you entering the number in say A1, but you have a formula in D1 that refers to A1. And D1 is where the formatting issue is happening?
OK, now we're getting somewhere...
1. A formula is NOT formatting....
A cells format is when you click Format - Cells, or right click the cell and choose "Format Cells"
2. The formula in cell H4 CANNOT, and Will Not "Pull in" the formatting from D4.
The format of H4 is completely independant of the format in D4.
The value entered in D4 will in no way effect the formatting of H4.
Hope this helps clear it up.