which format was used the most according to this chart ?
CREATE TABLE table_203_545 (
    id number,
    "single/ep" text,
    "release date" text,
    "label" text,
    "format(s)" text,
    "uk singles chart position" number,
    "notes" text
)
SELECT "format(s)" FROM table_203_545 GROUP BY "format(s)" ORDER BY COUNT(*) DESC LIMIT 1
Below are sql tables schemas paired with instruction that describes a task. Using valid SQLite, write a response that appropriately completes the request for the provided tables. ### Instruction: which format was used the most according to this chart ? ### Input: CREATE TABLE table_203_545 (
    id number,
    "single/ep" text,
    "release date" text,
    "label" text,
    "format(s)" text,
    "uk singles chart position" number,
    "notes" text
) ### Response: SELECT "format(s)" FROM table_203_545 GROUP BY "format(s)" ORDER BY COUNT(*) DESC LIMIT 1