When you use a list and iterate over there, Razor render engine create an specific name for every element in list, so we have 2 solutions.

1st is use razor to create dynamic js content
html:
@model IEnumerable<(Your model)>

<table class="table table-striped table-hover">
    <thead class="" style="background-color:#0061A0;color:#fff;">
        <tr>
            <th>Nombre</th>
            <th>Distribucion actual (%)</th>
            <th style="width:200px;">Nueva distribucion (%)</th>
        </tr>
    </thead>
    <tbody>

        @foreach (var i in Model)
        {

            <tr>
                <td>@i.Nombre</td>
                <td>@i.Porcentaje</td>
                <td>@Html.TextBoxFor(x => i.NuevaDistribucion, new { @class = "form-control", Style = "width:75%;margin-left:25px;", @Name = "nuevaDistribucion" + iterador, id = iterador })</td>
            </tr>
            iterador++;
        }

    </tbody>
</table>

Js:
    @Scripts.Render("~/plugins/validate")
    @(iterador = 0);
<script>
    $("#form1").removeAttr("novalidate");
    $(document).ready(function () {
        $("#form1").validate({
            rules: {
                @{
                    for (var i = 0; i < Model.Count(); i++)
                    {
                    <text>
                        @nuevaDistribucion@i: {
                            required: true,
                            min: 0,
                            max: 100
                        }@(i == Model.Count() ? "," : ",")
                    </text>

                        }

                    }
                }
            });
        });

</script>

2dn:

html;

@model IList<(Your model)>

<table class="table table-striped table-hover">
    <thead class="" style="background-color:#0061A0;color:#fff;">
        <tr>
            <th>Nombre</th>
            <th>Distribucion actual (%)</th>
            <th style="width:200px;">Nueva distribucion (%)</th>
        </tr>
    </thead>
    <tbody>

        @for (var i = 0; i < Model.Count(); i++)
        {

            <tr>
                <td>@Model[i].Nombre</td>
                <td>@Model[i].Porcentaje</td>
                <td>@Html.TextBoxFor(x => Model[i].NuevaDistribucion, new { @class = "form-control", Style = "width:75%;margin-left:25px;", @Name = "nuevaDistribucion" + iterador, id = iterador })</td>
            </tr>
            iterador++;
        }

    </tbody>
</table>

js;

    @Scripts.Render("~/plugins/validate")
<script>

    $("#form1").removeAttr("novalidate");
    $(document).ready(function () {

        $('#form1').validate();
            $('input[type="text"]').each(function () {
            $(this).rules('add', {
                required: true
            });
        });

    });

</script>