var items = AsDynamic(App.Data["entity_name"]);

<table border="1">
    <tr>
        <td>QuestionID</td>
        <td>Question description</td>
        <td>Yes</td>
        <td>No</td>
        <td>N/a</td>
        <td>Indicator %</td>
    <tr>
    <tr>
        <td>upa1</td>
        <td>This is upa1</td>
        <td>@items.Count(i => i.upa1 == "y")</td>
        <td>@items.Count(i => i.upa1 == "n")</td>
        <td>@items.Count(i => i.upa1=="na")</td>
        <td>@(((decimal)items.Count(i => i.upa1 == "y") * 100 / items.Count(i => i.upa1 == "s" || i.upa1 == "n")
        ).ToString( "0.0" ))%</td>
    <tr>
    <tr>
        <td>upa2</td>
        <td>This is upa2</td>
        <td>@items.Count(i => i.upa2 == "y")</td>
        <td>@items.Count(i => i.upa2 == "n")</td>
        <td>@items.Count(i => i.upa2=="na")</td>
        <td>@(((decimal)items.Count(i => i.upa2 == "y") * 100 / items.Count(i => i.upa2 == "s" || i.upa2 == "n")
        ).ToString( "0.0" ))%</td>
    <tr>
    <tr>
        <td>upb1</td>
        <td>This is upb1</td>
        <td>@items.Count(i => i.upb1 == "y")</td>
        <td>@items.Count(i => i.upb1 == "n")</td>
        <td>@items.Count(i => i.upb1=="na")</td>
        <td>@(((decimal)items.Count(i => i.upb1 == "y") * 100 / items.Count(i => i.upb1 == "s" || i.upb1 == "n")
        ).ToString( "0.0" ))%</td>
    <tr>
    (...)
</table>