Original sentence: A large percentage of sidewalks in the City of Los Angeles (43% or  of the 10,600 total miles) are in ill repair stemming from the City Council passing an ordinance in 1973 that relieved property owners of responsibility for repair of sidewalks damaged by roots while failing to concurrently allocate funds for city repairs of such sidewalks
Edited sentence: A large percentage of sidewalks in the City of Los Angeles (43% or  of the 10,600 total miles) are in ill repair stemming from the City Council passing an ordinance in 1973 that relieved property owners of responsibility for repair of sidewalks damaged by roots, while failing to concurrently allocate funds for city repairs of such sidewalks