Need to calculate LandUse (raster) area for municipalities (polygons)

[PatriciaNajera-Aguilar]

I need to calculate the municipal area (polygons) occupied by certain types of land use (sqkm and %), ecosystems and other natural areas in raster format.  Is there any tool for that?

[DanPatterson_Retired]

If you can work in raster format, have you ruled out zonal statistics style operations?
http://help.arcgis.com/en/arcgisdesktop/10.0/help/index.html#//009z000000w8000000.htm
you will have to calculate percentages after.