What is the percentage of the  trance- n himalaya zone that corresponds with the high hill zone is 25%?
create table table_10638523_1 (trance__n_himalaya_zone varchar, high_hill_zone varchar, PRIMARY KEY (trance__n_himalaya_zone))
select trance__n_himalaya_zone from table_10638523_1 where high_hill_zone = "25%"