I been trying to scal down the damage done by float% with no avail onentitytakedamage 

say c4 damages the wall at 250 i want to take 10% of that damage away

hitInfo.damageTypes.ScaleAll(50.0f);

Damage scale 0% to 100% is represents by a single digit: 0 to 1. 50% would be 0.5.
50.0f would be 5000%

Thanks