mot cua hang nhap ve loai xe dap voi gia 450000 dong mot chiec
a,Neu cua hang do ban voi gia 486000 dong mot chiec thi cua hang do lai duoc bao nhieu phan tram ?
b, Neu cua hang do ban voi gia 432000 dong mot chiec thi cua hang do bi lo bao nhieu phan tram ?