What is the GNP growth rate by the country of Shanghai?
GNP growth rate = DIVIDE(SUBTRACT(GNP, GNPOld), GNPOld); Shanghai is a name of city;
SELECT CAST((T1.GNP - T1.GNPOld) AS REAL) / T1.GNPOld FROM Country AS T1 INNER JOIN City AS T2 ON T1.Code = T2.CountryCode WHERE T2.Name = 'Shanghai'