Nigeria’s recalculated economy is worth $510 billion, by farthe biggest in Africa, officials announced Sunday. Nigeria knocked out of the ring South Africa, whose GDP of $353 billion waspreviously counted the biggest on the continent and which is the only Africanmember of the Group 20.Finance Minister Ngozi Ikonjo-Iweala told a news conference Sunday that the newdata makes Nigeria the 26th largest economy in the world and raises its per capitaincome to $2,688, making it No. 121 in the world, up from No. 135.