The ratio of the number of votes currently obtained to the total number of votes =(2/3)*(5/6)=5/9.

So,

The ratio of the number of votes still needed to the total number of votes = 3/4-5/9 = 7/36.

The ratio of remaining votes to total votes = 1-2/3 = 1/3.

So:

The ratio of required votes to remaining votes = (7/36)/(1/3) = 7/12.

He still needs to get 7 of the remaining 12 votes to be elected.