void setup() 
{
  Serial.begin(9600);
  pinMode(A2,INPUT);          // not required when using analog input
  pinMode(A9,INPUT);          // not required when using analog input
}

void loop() 
{
  int current1 = analogRead(A2);
  int current2 = analogRead(A7);    // changed A9 to A7

  float voltage1 = float(current1) * (5.0/1023.0);   // changed to 'float'
  float voltage2 = float(current2) * (5.0/1023.0);   // changed to 'float'

  Serial.print("Poti_1 ");
  Serial.print(voltage1);           // changed for both on same line
  Serial.print(", Poti_2 ");        // changed for both on same line
  Serial.println(voltage2);

  delay (1000);
}