Defense Plus %

Defense Plus %, also known as Vit +%, is a recurring ability in the series. It first made its debut in Final Fantasy VIII with various other Plus % abilities, and generally boosts a user's Defense stat by a certain percentage, ranging anywhere between 3% to 60%, to a maximum of 100% if stacked together.

Final Fantasy VIII
The first game to support Defense Plus % abilities, otherwise known as Vit +%. The game features Vit +20%, +40%, and +60%, each of which can be taught to any GF through the items Turtle Shell, Orihalcon, and Adamantite, with Vit +60% only being learned by using an Adamantite. Vit +20% and +40% can both be learned on the GFs Shiva and Carbuncle.

Final Fantasy X
Defense +3%, +5%, +10%, and +20% can all be found on dropped armor or customized by using 3 Power Sphere, 2 Stamina Spring, 1 Special Sphere, and 4 Blessed Gems respectively.