John Dramani Mahama, who is returning as Ghana's president eight years after losing power, achieved his political comeback on a promise to mend the West African country's economy.

Ghana's opposition candidate and former President John Mahama has promised "a new beginning, a new direction" for the country after being officially declared the winner of Saturday's presidential election. Mahama won with 56.6% against 41.6% for Vice-President Mahamudu Bawumia. It is the biggest margin of victory in the country for 24 years.