Excel VBA: Get inner text of HTML table td

You seem to have a typo in your variable name. Have you used Option Explicit?

Function myFunction(id)
    Call myConnection(id)    
    Set myDadta = oHtml.getElementById("myDiv").getElementsByClassName("myTable")(0).getElementsByClassName("data")(0)
    myFunction = myData.innerText   ' <-- This line
End Function

UPDATE

I put a Button on VBA form and the following corrected code that works:

Option Explicit

Dim oHtml, myData

Private Sub CommandButton1_Click()
    MsgBox myFunction(0)
End Sub

Function myFunction(id)
    Call myConnection(id)
    Set myData = oHtml.getElementById("myDiv").getElementsByTagName("Table")(0).getElementsByTagName("td")(1)
    myFunction = myData.innerText ' <-- will give 0.51
End Function

Public Sub myConnection(id)
    Set oHtml = New HTMLDocument
    With CreateObject("WINHTTP.WinHTTPRequest.5.1")
        '.Open "GET", "http://www.example.com" & id, False
        .Open "GET", "http://localhost/Test/Test.htm", False   '<-- this is my local machine; replace appropriately
        .send
        oHtml.body.innerHTML = .responseText
    End With
End Sub

UPDATED CODE TO DEMONSTRATE FUNCTION ON LIVE URL

Option Explicit

Dim oHtml, myData

Private Sub CommandButton1_Click()
    MsgBox myFunction(0)
End Sub

Function myFunction(id)
    Call myConnection(id)
    Set myData = oHtml.getElementById("overallRatios").getElementsByTagName("Table")(0).getElementsByTagName("td")(1)
    myFunction = myData.innerText  
End Function

Public Sub myConnection(id)
    Set oHtml = New HTMLDocument
    With CreateObject("WINHTTP.WinHTTPRequest.5.1")
        '.Open "GET", "http://www.example.com" & id, False
        .Open "GET", "http://www.reuters.com/finance/stocks/overview?symbol=PTI.LS", False
        .send
        oHtml.body.innerHTML = .responseText
    End With
End Sub

This works for me. I have set reference to Microsoft HTML Object Library

BTW you are missing a "in <div id=myDiv">

Option Explicit

Sub Sample()
    Dim objIe As Object, xobj As HTMLDivElement

    Set objIe = CreateObject("InternetExplorer.Application")
    objIe.Visible = True

    objIe.navigate "C:\a.htm"

    While (objIe.Busy Or objIe.READYSTATE <> 4): DoEvents: Wend

    Set xobj = objIe.document.getElementById("myDiv")
    Set xobj = xobj.getElementsByClassName("myTable").Item(0)
    Set xobj = xobj.getElementsByClassName("data")(0)

    Debug.Print xobj.innerText

    Set xobj = Nothing

    objIe.Quit
    Set objIe = Nothing
End Sub

Screenshot: