Destroying walls, but they dont go to 1%

Destroying walls, but they dont go to 1%
Building walls is very difficult and requires flat land. Now I need to destroy a wall, but it will not even go to 1%. Is there a special way to destroy a wall?
Building walls is very difficult and requires flat land. Now I need to destroy a wall, but it will not even go to 1%. Is there a special way to destroy a wall?