I am using ArcGIS Desktop 10.3.
I have two polygon shape files that represents the building footprints and the plot. I want to calculate the plot ratio (area of built/area of the plot). I used spatial join with sum function, but summing up the area of the polygons that located inside one plot is not calculated correctly. Any idea how to do that? the last column is the actual value the one before last is calculated by spatial join.