So more to the OP's question did you bother to size the feeder with a 3% VD based on 100 amps?
To answer your question as is asked? Nope
I don't know the last time I've done a voltage drop calculation and used 3% - maybe never, especially after realizing that the target should never be a percentage. The target should be the voltage after drop
If 3% is idealized from a standard voltage of 120, 240, etc then it's pretty easy to determine what your target voltage is after subtracting 3% of that.
So what happens when your starting voltage is higher? It means your voltage drop percentage can be much higher and still hit that target voltage.
Like I demonstrated in the screenshots from the voltage drop calculator, subtracting 3% from 240 gives the same result as subtracting 5% from 245