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_name_72 (rating VARCHAR, episode__number VARCHAR)
### Question:
What is the rating/share for episode 13?
### Answer:
SELECT rating / SHARE(18 AS –49) FROM table_name_72 WHERE episode__number = 13