Respuesta :
Your perfect! Your weight is just right! Stay in the 20s and you won't have to gain or lose weight.
13-year-old girls have an average wight of 45.8kg (101lbs)
So in your case, you're either tall or muscular, but cannot be considered neither fat nor obese - you are healthy, and are not in the need of loosing weight.
Hope it helped,
BioTeacher101