CREATE TABLE table_name_83 (lost NUMBER, matches VARCHAR2, win__percentage VARCHAR2)

Matches of 15, and a Win % smaller than 20 had what highest lost?
SELECT MAX(lost) FROM table_name_83 WHERE matches = 15 AND win__percentage < 20
SELECT MAX("lost") FROM "table_name_83" WHERE "matches" = 15 AND "win__percentage" < 20