So I am an admin of a clan, and my main job is to find lionesses 15% or lower in Trading Center.

My suggestion;
To add a feature in the Trading Center where you can search the specific % or like the way Age is;
Exactly, Lower than, More than.

Could still have the search fertility search and then my suggestion under it, or next to it, like the age search.

If you have any suggestions or ideas feel free to say
If you dont support please explain, maybe I could edit it