, the world's largest artificial lake, extends through large portions of eastern Ghana. Demographics Main article: Demographics of Ghana Kumasi The major ethnic groups are Akan 49.3%, Mole - Dagbon 15.2%, Ewe 11.7%, Ga -Dangme 7.3%, Guan 4%, Gurma 3.6%, Gurunsi 2.6%, Mande -Busanga 1%, other tribes 1.4%, other ( Hausa