SELECT evaluation_average__before_april_2009_ FROM table_name_41 WHERE _percentage_of_negative_evaluations = "0.8%" AND evaluation_average__from_april_2009_ = "4.2"
Berapa angka evaluasi rata -rata (sebelum April 2009) ketika persentase evaluasi negatif adalah 0,8% dan jumlah evaluasi rata -rata April 2009 adalah 4,2?
CREATE TABLE table_name_41 (evaluation_average__before_april_2009_ VARCHAR, _percentage_of_negative_evaluations VARCHAR, evaluation_average__from_april_2009_ VARCHAR)