I am looping through sheets "s" 2 to 20

For s = 2 To ActiveWorkbook.Sheets.Count
If Sheets(s).Range("A50").Value = 3 Then
Sheets(s).Range("A4:A19").Select
Selection.NumberFormat = "0.00%"
End If
Next s

This works fine ... Sheets(s).Range("A50").Value

Sheets(s).Range("A4:A19").Select.... When I change .Select to.Value ,
I get an error. What can I use as an alternate?