Healing consumes 16.** charges?

Camping aid kits and emergency med kits let survivors heal one state with their 16 charges. But, when adding bandages or self-adherent wrap to a first aid kit (24 + 8 =32), the last 16 charges only cover 99.9% of the heal and cannot be completed without external aid. Is there an extra small percentage level actually required to fully heal?

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