cuoi nam 2010 ,so dan cua xa Binh An la 31250 nguoi .Cuoi nam 2011 la 31750 nguoi .Hoi:
a)Tu cuoi nam 2010 den cuoi nam 2011 so dan cha xa do tang bao nhieu phan tram?
b)Neu tu cuoi nam 2011 den cuoi nam 2012 so dan cua xa do van tang theo ti le phan tram do thi cuoi nam 2012 so dan cua xa do la bao nhieu nguoi ?