Combat

Combat comprises several skills in this game. Attack, Defense, Ranged, Magic, and Prayer

the damage you deal and take takes a lot of factors into consideration but most simply, attacks that hit are modified either flatly or by percentages

Let's say you're fighting a goblin brigand who has 100 armor. The first 100 points of damage you deal are absorbed by their armor unless you critically hit in which case you would ignore all of their armor.

Now let's say you are fighting a red dragon who has 1200 armor and 300 fire resistance.