The new AP ratio for Singed's Q is supposed to be 80% due to the new patch, however as of now the Ap ratio is being shown as 40% in game. The description shows 40% and upon testing it in practice mode I'm almost certain the dammage output is 40% aswell.
http://imgur.com/a/Gh0qr - Screenshot of the Q ratio shown, 400 dmg with 1000 ap, supposed to be 800.
P.S Whoever was in charge of the Q particles needs a raise, it looks awesome.(http://imgur.com/a/Gh0qr)