What's the rank when the obese children and adolescent count is 14.2%?
CREATE TABLE "prevalence_by_state" (
  "state_and_district_of_columbia" text,
  "obese_adults" text,
  "overweight_incl_obese_adults" text,
  "obese_children_and_adolescents" text,
  "obesity_rank" real
);
SELECT SUM("obesity_rank") FROM "prevalence_by_state" WHERE "obese_children_and_adolescents"='14.2%';