This will yield 75.00%
I don't think there is a way to selectively show digits to the right of the decimal only when they are not 00, so either you can always round (75.7% = 76%) or always show decimals.
I'm not 100% certain about this however.
There is a tutorial which describes all the tags you can use in setting numerical, date and other formats here:
Thanks for the replies - I obviously did not explain myself properly ! It is the decimal point symbol that I want removed if the first value after the decimal point is a zero
When I use #0.#% I get the following sample results
decimal ; formatted % ; result
0.123 ; 12.3% ; great
0.0123 ; 1.2% ; great
0.00123 ' 0.1% ; great
0.12 ; 12.% ; bad - decimal point (not place) is present
Aran - I don't want 75.00% - I just want 75% in this case
Jonathan - this would give me 75.0% - I just want 75% in this case