CREATE TABLE "brazil_s_15_busiest_airports_by_passenge" (
  "rank" real,
  "location" text,
  "total_passengers" real,
  "annual_change" text,
  "capacity_in_use" text
);

Question: What is the Capacity in use with an Annual change that is 21.8%?
SQL: SELECT "capacity_in_use" FROM "brazil_s_15_busiest_airports_by_passenge" WHERE "annual_change"='21.8%';