I think there's a bit of confusion with the percentage. Some people view it as 30-35% being legal and others will look at it about 70%. Keep in mind it's the measurement of opacity -- the degree to which light is not allowed to travel through.
Edit: With it being a fix-it, you can take it to any officer, have them inspect it and sign off. There will still be a $20 or maybe it was $25 fee for the infraction.