How to sync motor speed???

Using Arduino Project Guidance
10

So this is what im working with right now:

int E1 = 5;     //Right Motor Power
int E2 = 6;     //Left Motor Power
int M1 = 4;    //Right Motor Direction
int M2 = 7;    //Left Motor Direction

const byte encoder0pinA = 2; //Interrupt 0
const byte encoder0pinB = 12;
const byte encoder1pinA = 3; //Interrupt 1
const byte encoder1pinB = 13; 
byte encoder0PinALast;
byte encoder1PinALast;
int duration0;//Encoder0 number of pulses
int duration1;//Encoder1 number of pulses
boolean Direction0;
boolean Direction1;

void setup()
{  
  Serial.begin(9600);//Initialize the serial port
  EncoderInit();//Initialize the module

}

void loop()
{
  Serial.print("Left Pulse:");
  Serial.println(duration0);
  Serial.print("Right Pulse:");
  Serial.println(duration1);
  duration0 = 0;
  duration1 = 0;
  analogWrite (E1,100);    
  digitalWrite(M1,LOW);
  analogWrite (E2,107.9);    
  digitalWrite(M2,LOW);   
  delay(500);
}

void EncoderInit()
{
  Direction0 = true;
  Direction1 = true;  
  pinMode(encoder0pinB,INPUT);
  attachInterrupt(0, wheelSpeed0, CHANGE);
  pinMode(encoder1pinB,INPUT);  
  attachInterrupt(1, wheelSpeed1, CHANGE);
}


void wheelSpeed0()
{
  //Encoder 0 Code
  int Lstate = digitalRead(encoder0pinA);
  if((encoder0PinALast == LOW) && Lstate==HIGH)
  {
    int val0 = digitalRead(encoder0pinB);
    if(val0 == LOW && Direction0)
    {
      Direction0 = false; //Reverse
    }
    else if(val0 == HIGH && !Direction0)
    {
      Direction0 = true;  //Forward
    }
  }
  encoder0PinALast = Lstate;

  if(!Direction0)  duration0++;
  else  duration0--;
}

void wheelSpeed1()
{
  //Encoder 1 Code
  int Lstate1 = digitalRead(encoder1pinA);
  if((encoder1PinALast == LOW) && Lstate1==HIGH)
  {
    int val1 = digitalRead(encoder1pinB);
    if(val1 == LOW && Direction1)
    {
      Direction1 = false; //Reverse
    }
    else if(val1 == HIGH && !Direction1)
    {
      Direction1 = true;  //Forward
    }
  }
  encoder1PinALast = Lstate1;

  if(!Direction1)  duration1++;
  else  duration1--;
}

This is the serial output:

Left Pulse:1
Right Pulse:-1
Left Pulse:780
Right Pulse:708
Left Pulse:1437
Right Pulse:1321
Left Pulse:1618
Right Pulse:1491
Left Pulse:1675
Right Pulse:1549
Left Pulse:1697
Right Pulse:1571
Left Pulse:1704
Right Pulse:1579
Left Pulse:1707
Right Pulse:1589
Left Pulse:1709
Right Pulse:1589
Left Pulse:1712
Right Pulse:1591
Left Pulse:1714
Right Pulse:1594
Left Pulse:1716
Right Pulse:1591
Left Pulse:1717
Right Pulse:1592
Left Pulse:1719
Right Pulse:1593
Left Pulse:1722
Right Pulse:1592
Left Pulse:1723
Right Pulse:1597
Left Pulse:1722
Right Pulse:1597
Left Pulse:1724
Right Pulse:1600
Left Pulse:1725
Right Pulse:1604

At this speed it takes the Right wheel about 1.2s so right wheel average of 1596/1200 milliseconds = 1.33 more or less the speed that i want..