Thanks @somarco. But let me add little more detail for everyone. For all 3 plans, I have no problem with the different wait times, different procedures covered, or selecting a dentist in any of the plans. And I have no problem comparing percentages between Plan A and Plan B.
For me the problem is that Plan A and Plan B are percentage based, while DeltaCare is dollar based. But I don't know the cash cost against which to compare.
An example for a procedure that costs $400:
Plans A and B offer 20% and DeltaCare offers $80 - they're the same
Plans A and B offer 20% and DeltaCare offers $120 - DeltaCare costs more
Plans A and B offer 20% and DeltaCare offers $60 - DeltaCare is the best choice
Again, I can't know which is best if I don't know that the procedure costs $400.
Sorry for the long example, I hope this clarifies the issue and that the math is right.