The following are the biggest percentage decliners on the TSX Venture Exchange in mid afternoon trading with their price movements DEVIN ENERGY (DVC H.V), $0.1750, 0.17, 49.28% GREENBRIAR CAPITAL (GRB.V), $0.99, 0.26, 20.80% QUESTFIRE ENERGY (Q A.V), $0.42, 0.15,