Below is the list of tables from the database along with their columns and datatype. Need to generate an accurate SQL query for the question.
Only use the columns present in the respective table. Only use the columns which are required to generate the SQL query. Only use table joins if required and not otherwise.

### Tables ###
TABLE: CREATE TABLE table_name_19 (gdp__percentage_of_eu__2012_ VARCHAR, gdp_in_s_billion_of_usd__2012_ VARCHAR)

### Question ###
What is the GDP % of EU in 2012 of the country with a GDP in billions of USD in 2012 of 256.3?

### Accurate SQL ###

SELECT gdp__percentage_of_eu__2012_ FROM table_name_19 WHERE gdp_in_s_billion_of_usd__2012_ = 256.3