Talk:Heimerdinger/@comment-88.115.94.175-20110117151215/@comment-3067750-20110118033145

Test 1 Actual Damage: 30
 * Target (First Wave Minion) MR: 0
 * Turret AD: 30
 * Player MPen: 0

Test 1 Actual Damage: 23
 * Target (Level 1 Sivir Bot) MR: 30
 * Turret AD: 30
 * Player MPen: 0

Test 1 Actual Damage: 72
 * Target (Mana Golem) MR: -30
 * Turret AD: 59
 * Player MPen: 0

If you use Magic Resistance as damage reduction, it matches up completely.

72 = 59 * ( 1 - [ -30 / ( 100 + | -30 | ) ] )