How can i make backgroundworker to report progress from a new class to a label in form1 ?

Ok i did now in form1:

void bgw_ProgressChanged(object sender, ProgressChangedEventArgs e)
        {
            label3.Text = e.ProgressPercentage + " %";
        }

And in the class in the DoWork event:

void bgw_DoWork(object sender, DoWorkEventArgs e)
        {
            for (int i = 0; i < allLinksToParse.Count; i++)
            {
                GetResponsersFN(allLinksToParse[i]);
                int position = (int)Math.Round((i / 10f) * 100);
                bgw.ReportProgress(position);
            }
        }

label3 end with 490%