text: Below is an context that describes a sql query, paired with an question that provides further information. Write an answer that appropriately completes the request.  # noqa: E501
  ### Context:
  CREATE TABLE table_21284653_1 (change___percentage_ VARCHAR, area__km²_ VARCHAR)
  ### Question:
  What is the change (%) when the area size (km2) is 247.21?
  ### Answer:
  SELECT change___percentage_ FROM table_21284653_1 WHERE area__km²_ = "247.21"