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_2668336_24 (incumbent VARCHAR, candidates VARCHAR)
### Question:
How many times is the candidates charles f. mercer (f) 100%?
### Answer:
SELECT COUNT(incumbent) FROM table_2668336_24 WHERE candidates = "Charles F. Mercer (F) 100%"