What are two methods of active transport ?

The first one is that transport proteins in the cell membrane ' Pick up ' molecules from outsides the cell and carry them in , while using energy in the process

The second method is that the the cell membrane surrounds a particle and takes it in

I hope that's help !

it takes hundreds of years to become stable.

if you have another question lmk.

not sure if this what   you'r looking for would be percent composition