But Fayulu denounced the figures as an "electoral coup" forged by Tshisekedi and Kabila, and filed an appeal with the Constitutional Court. His move that risks stoking further unrest over the bitterly disputed poll.
Ahead of the ruling, hundreds of Tshisekedi's supporters were in the streets of the capital, Kinshasa, waving tree branches and banners reading "Congo for the Congolese".
He makes the extraordinary accusation of an election rigged in favour of the opposition, asserting that outgoing President Joseph Kabila made a backroom deal with the declared victor, Felix Tshisekedi, when the ruling party's candidate did poorly.
DRC's Constitutional Court is poised to rule on a challenge to the election results by the declared runner-up, who alleges fraud.
"As a matter of fact, it is not a secret from anyone inside and outside the country that you have elected me as President of the Democratic Republic of Congo with over 60% of the votes." his statement read in part.
All of the election results, not just the presidential ones, had been widely questioned after Kabila's ruling coalition won a majority in legislative and provincial votes while its presidential candidate finished a distant third.
The court decision came amid unprecedented pressure from the African Union, which said it had "serious doubts" about the veracity of the results announced by the election commission.
"This is a scandalous statement that we don't support". It may also worsen the sporadic unrest that has already seen 34 people killed, 59 wounded and 241 "arbitrary arrests" in the past week, according to the United Nations human rights office.
The court turned away Fayulu's request for a recount in the December 30 vote.
Voting data points to massive fraud in DRC presidential election
Meanwhile, Legit.ng had earlier reported that the former deputy national publicity secretary of the All Progressives Congress (APC), Comrade Timi Frank, expressed confidence that there would be a repeat of the defeat of the ruling party in the Democratic Republic of Congo in the forthcoming presidential election in Nigeria.
Independent monitors have flagged major flaws, including faulty voting machines and polling stations at which many were unable to vote.
The Financial Times conducted a separate analysis on voting results collected manually by the Catholic Church's deployed 40 000 observers. Tshisekedi and Ramazani were virtually neck-and-neck second place with 16.93 percent and 16.88 percent, respectively.
Accordingly, the Heads of State and Government called for the suspension of the proclamation of the final results of the elections.
Mr Fayulu applauded the African Union's statement and welcomed the delegation's imminent arrival in Kinshasa in remarks on Friday night.
Many Congolese are now concerned that the election dispute will fan widespread, violent disorder. It stressed the need for stability in a country where conflicts over the past two decades have killed millions of people.
Congo's vast interior is a vital source of copper and other metals, including cobalt, used in electric vehicle batteries and mobile phones.
It became a battlefield for two regional wars in 1996-97 and 1998-2003, and the last two presidential elections, in 2006 and 2011, were marked by bloody clashes.
Many people in the courtroom erupted in cheers after the declaration, along with Tshisekedi supporters who had gathered outside.