diff --git a/RH/CalculoSBC.aspx.cs b/RH/CalculoSBC.aspx.cs
index 75e090f23..5f0c0dddc 100644
--- a/RH/CalculoSBC.aspx.cs
+++ b/RH/CalculoSBC.aspx.cs
@@ -947,7 +947,10 @@ public partial class RH_CalculoSBC : ClsPaginas
 
         if (e.Row.RowType == DataControlRowType.DataRow)
         {
-            e.Row.FCCheckBox("chkUpdate").Checked = !(string.Format("{0:N2}", e.Row.DBCampo("SalarioDiarioSSNuevo")) == string.Format("{0:N2}", e.Row.DBCampo("SalarioDiarioSS")));
+            decimal valueold = e.Row.DBCampo("SalarioDiarioSS").ToString().ToDecimal();
+            decimal valuenew = e.Row.DBCampo("SalarioDiarioSSNuevo").ToString().ToDecimal();
+            decimal diferencia = Math.Abs(valueold - valuenew);
+            e.Row.FCCheckBox("chkUpdate").Checked = diferencia > 0.01M;
             e.Row.FCLabel("lblsalarioDiarioSSf").Text = e.Row.FCCheckBox("chkUpdate").Checked ? "Si" : "No";
         }