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_21481509_4 (r1b1a2__r_m269_ VARCHAR, r1b1c__r_v88_ VARCHAR)
  ### Question:
  What percentage is listed in column r1b1a2 (r-m269) for the 77.8% r1b1c (r-v88)?
  ### Answer:
  SELECT r1b1a2__r_m269_ FROM table_21481509_4 WHERE r1b1c__r_v88_ = "77.8%"