What is every percentage of overweight or obese adults when 12.4% of children and adolescents are obese?
create table table_18958648_1 (overweight__incl_obese__adults varchar, obese_children_and_adolescents varchar, PRIMARY KEY (overweight__incl_obese__adults))
select overweight__incl_obese__adults from table_18958648_1 where obese_children_and_adolescents = "12.4%"