Added 8 minutes later
If it says somewhere about penetrating/ignoring a certain percentage of armor, then most often this means that this number is subtracted from the percentage of armor.
Each attack deals (perception/8)% damage from the target's max HP and dodge/accuracy.
Throwing Knives
The character is trained to throw knives; range - 7.
Damage: (perception/2)% of the target's max. HP. A critical hit deals four times the damage.
Fallen Petal
The character deals normal damage + 15% of the maximum health of their opponents, ignoring armor (but not shields).
The selected character becomes paralyzed until they pass a resistance check and receives (SP/25)% damage from their maximum health each turn.
The spellcaster absorbs +10% of the health of characters in the area of effect and converts it into their energy reserve.