A survey by the Institut Darul Ehsan (IDE) found that some 78.9 of Selangor voters are expected to cast out their ballots in the upcoming state election.br br The think-tank under the Selangor government found that the voter turnout for Pakatan Harapan supporters will be the highest at 86.6, followed by Barisan Nasional at 72.8 and Perikatan Nasional at 77.3.