Add +1 each time a sphere turns 1 degree on it's axis

In this game of mine, a character is running on a big sphere which represents the world, but he doesn't move, the world does.

Well I want to count the distance he travels. 1 meters equals 1 degree on my sphere.

 void Update()
 {
     transform.Rotate(new Vector3(0, 0, speed * TIme.deltaTime));
    distanceTxt.text = meter.ToString("f0");

     float rota = transform.eulerAngles.x;
     if(rota % 1<=0.1f)
     {
         meter++;
     }
 }

Problem is, it is counting it too many times (3 degrees on the inspector, and meter = 169). Obviously since it's on Update. LateUpdate doesn't work. Neither fixed. Can't find a way to do it.

Any ideas ?