Insert 2 columns before B

Id, ImpMunID, FIPSCode, Id2, Geography, Target Geo Id, Target Geo Id2, Geographical Area, Geographical Area, Population, Housing units, ImpMunSquareMiles, AreaInSquareMilesWater, AreaInSquareMilesLand, DensityPerSquareMileLand, DensityPerSquareMileLandHousing, ImpMunPercentWater (Column Q)

 in C2 enter "=RIGHT(G2,3)" and copy down

in Q2 enter "=ROUND((M2/L2)*100,2)" and copy down