There were also questions over the effectiveness of the agency's board - which only approved projects with a budget of more than £6million - and the lack of clarity over the relationship with mayoral advisers.
Mr Livingstone said: "The fact that even a Tory-dominated panel keeps coming back to such a small number of projects which allegedly failed and which represents such a tiny fraction of the LDA's budget actually shows the organisation's overall success."
Five projects funded by the LDA are being investigated by police.
All of them - the Caribbean Showcase, Diversity International, Brixton Base, Green badge taxi school and Ethnic Mutual - have links with Lee Jasper, the former race and policy adviser to Mr Livingstone.
Mr Jasper, who resigned in March, has denied any impropriety.