How long does it take for a 15 year old male at 15-14% body fat to lose 3% body fat?

You are only 15 years old! There are more important things out there in the world to be worried about than that. You are tall and your weight is fine.

Enjoy life!

I cant really gove you an answer,but what I can give you is a way to a solution, that is you have to find the anglde that you relate to or peaks your interest. A good paper is one that people get drawn into because it reaches them ln some way.As for me WW11 to me, I think of the holocaust and the effect it had on the survivors, their families and those who stood by and did nothing until it was too late.