Refer to Constitution.
Constitution of Zambia (Amendment) [No. 2 of 2016]…
’47. (1) Elections to the office of President shall be conducted directly, under a majoritarian electoral system, where the winning candidate must receive more than fifty percent of the valid votes cast, and in accordance with Article 101.’
CALCULATION: Add votes for all candidates and get 100%, 3,695,710 is total of valid votes cast representing 100%.
NOTE: 1,847,855 is exactly 50% of total valid votes cast.
Edgar Lungu scores 1,860,877 which is 50.35%
A difference of 13,022 votes.
Had there been just one extra vote above 50% that would have met the 50%+1 requirement.