I see you made edits. 44.2% = 442 grams spinosad per liter or 442 mg spinosad per one ml. You're off by three decimal points.Hate to necro this thread, but you are soooooo wrong.
Elector PSP is 44.2% spinosad per ml. I don't know where you equated % to grams, but it's wrong.
So at a dilution of 8.9 ml Elector PSP per gallon, or 3785.41 ml, the math is
8.9 ml x 0.442 spinosad per ml / 3785.41 ml = 0.001% spinosad per ml