Question: What is the essay title of the project that have the highest total price excluding optional support and who is the biggest donor? Identify the donor and calculate how many percent did he/she donated in the project.
SQL: SELECT T1.title, T3.donor_acctid, CAST(T3.donation_to_project AS REAL) / T2.total_price_excluding_optional_support FROM essays AS T1 INNER JOIN projects AS T2 ON T1.projectid = T2.projectid INNER JOIN donations AS T3 ON T2.projectid = T3.projectid ORDER BY T3.donation_to_project DESC LIMIT 1