Word 2000

Part I: What is the correct Number Format to use for % if I want to have 3
places behind the decimal? I want to be able to enter 7.5, 7.50 or 7.500 in
a cell and have all 3 entries come back with 7.500%. I am using #.###% but
it does not add the extra zeroes: 7.5 comes back as 7.5%
(I have identified this cell as B26 for Part II)

Part II: I want the cell next to it to autopopulate as B26 + .25 (7.750%
in the example above) When I put =B26+.25 in the expression field, it does
not work. It comes back as 0.32, not 7.75%

Part III: How would I code it so that the cells with the calculations would
remain blank until the user entered the base data into B26?

Thank you