Nao consigo dividir! help-me

private List regule(List lis){
        System.out.println("entrei aki");
        List<Integer> newlist = new ArrayList<Integer>();
        int total = 0;
        int num = 0;
        double n;
        //sum List's total
        for(int i=0;i<listvalues.size();i++){
            total += (int)listvalues.get(i);
        }
        System.out.println("total:"+total);
        
        for(int i=0;i<listvalues.size();i++){
            num = (int)listvalues.get(i);
            n = (double)(num/total)*100;
            System.out.println(num+" / "+total+" * 100 = "+n);
//            newlist.add(n);
        }
        return newlist;
    }