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 (r1b1c__r_v88_ VARCHAR, total_percentage VARCHAR)
### Question:
What percentage is listed in column r1b1c (r-v88) for the 4.5% total percentage?
### Answer:
SELECT r1b1c__r_v88_ FROM table_21481509_4 WHERE total_percentage = "4.5%"