Converting %by Weight to % Volume

Converting %by Weight to % Volume   (10/04/2011, 4:56 PM)

I have a formula for making a degreaser, But i dont know how to convert it to % by volume. formula..Water----68.50, NaOH, 50%----2.00 , Calsoft LAS-99---7.00, Pilot SXS-40---7.50, Na4EDTA---2.00, Caloxylate N-9----5.00, Ethylene Glycol Monobutyl Ether---3.00, Sodium Metasilicate---5.00