Database: professional_basketball
Question: What is the full name of the team with the fastest growth in winning rate in the 'ABA' league from 1972 to 1973?
SQL: SELECT T1.name FROM teams AS T1 INNER JOIN ( SELECT * FROM teams WHERE lgID = 'ABA' AND year = 1972 ) AS T2 ON T1.tmID = T2.tmID WHERE T1.lgID = 'ABA' AND T1.year = 1973 ORDER BY (CAST(T1.won AS REAL) / (T1.won + T1.lost) - (CAST(T2.won AS REAL) / (T2.won + T2.lost))) DESC LIMIT 1