A percentage bequest is a type of planned giving where an individual allocates a certain percentage of their estate to a designated beneficiary, such as a cancer charity or research organization. Unlike a fixed sum bequest, which could diminish in value over time due to inflation or changes in asset value, a percentage bequest adjusts with the size of the estate, providing a more flexible and potentially more substantial contribution. This method can be particularly beneficial in supporting cancer research, where funding needs are dynamic and ongoing.