Divide Rest of the Columns using Column A values

[Admin]

Hi

try

Option Explicit

Sub kTest()
    
    Dim r   As Long, c  As Long
    Dim ColA, d, Dest As Range
    
    With Worksheets("Sheet1")
        r = .Range("a" & .Rows.Count).End(xlUp).Row
        c = .Cells(1, .Columns.Count).End(xlToLeft).Column
        ColA = .Range("a2:a" & r).Value2
        d = .Range("b2", .Cells(r, c)).Value2
        Set Dest = .Range("b2")
    End With
    
    If IsArray(ColA) Then
        If IsArray(d) Then
            For r = 1 To UBound(ColA, 1)
                For c = 1 To UBound(d, 2)
                    If ColA(r, 1) = 0 Then
                        d(r, c) = "=iferror(" & d(r, c) & "/" & ColA(r, 1) & ",0)"
                    Else
                        d(r, c) = "=" & d(r, c) & "/" & ColA(r, 1)
                    End If
                Next
            Next
            Dest.Resize(UBound(d, 1), UBound(d, 2)).Value2 = d
        End If
    End If
    
End Sub