Final answer:
The death gratuity can be designated by 100% increments up to 100%.
Step-by-step explanation:
The topic in question is the death gratuity, which is a lump sum payment made to the surviving family members of military personnel who die while on active duty.
The percentage parameter in the question refers to the portion of the death gratuity that can be designated. In this case, the answer would be 100%. This means that the entire death gratuity amount can be designated by the beneficiary in increments of any percentage up to 100%.