int i = 0;
long rndNr[7] = {0, 0, 0, 0, 0, 0, 0};     // Index 0 = Wurf-Nummer, Index 1 - 6 ist den Augen zugeordnet

void setup() {
  // put your setup code here, to run once:
  Serial.begin(9600);
}

void loop() {
  // put your main code here, to run repeatedly:
  i = random(1, 7);
  rndNr[0] ++;
  rndNr[i] ++;

  Serial.print(rndNr[0]);
  Serial.print("\t\t");
  for (long x = 1; x <= 6; x++){
    Serial.print(float(rndNr[x]) / float(rndNr[0]) * 100.0);
    Serial.print("%\t\t");
  }
  Serial.println("");
}