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_30 (function__percentage VARCHAR, estimated_function__percentage VARCHAR)
### Question:
What is the function percentage when the estimated function percentage is 20?
### Answer:
SELECT function__percentage FROM table_name_30 WHERE estimated_function__percentage = 20