If you have 10 people coming to church every Sunday, that gives you an average attendance of 10.
But if that changes so that you have 12 people on the rolls, of which three-fourths come every Sunday, your average attendance is now 9 – a ten-percent decrease.
Or, looked at another way, the total number of people involved in your worship life has gone up 20%.
That’s pretty much the point made by Baptist George Bullard in “Think attendance in your church is declining? Think Again.”
More people attending church less often – sounds about right to me.