Question: Among the technology items, what percentage of them are from Best Buy for Business? Provide the date of the project related to those items.
SQL: SELECT CAST(SUM(CASE WHEN T1.vendor_name = 'Best Buy for Business' THEN 1 ELSE 0 END) AS REAL) * 100 / COUNT(T1.projectid) FROM resources AS T1 INNER JOIN projects AS T2 ON T1.projectid = T2.projectid WHERE T1.project_resource_type = 'Technology' UNION ALL SELECT DISTINCT T1.date_posted FROM projects AS T1 INNER JOIN resources AS T2 ON T1.projectid = T2.projectid WHERE T2.vendor_name = 'Best Buy for Business' AND T2.project_resource_type = 'Technology'