Someone

class Test1
{
        private static long filesize = 0;
        private static double percentage = 0.0;
        private static long offset = 0;
        private static long bytes = 0;

        public static void main(String[]args)
        {
                //filesize = 4205615302;
                //offset = 2147483648;
                bytes = 1048576;

                percentage = ((double)(offset + bytes) / (double)filesize)*100;

                System.out.println(percentage);
        }
}