title: How to specify the grid row height in percents?
body: <p>I have two rows like this:</p>
  
  <pre><code> &lt;Grid.RowDefinitions&gt;
      &lt;RowDefinition Height="85.7*" /&gt;
      &lt;RowDefinition Height="14.3*" /&gt;
   &lt;/Grid.RowDefinitions&gt;
  </code></pre>
  
  <p>First one is empty, the second one contains a combo box:</p>
  
  <pre><code>&lt;ComboBox Grid.Row="1" Grid.RowSpan="1" ItemsSource="{Binding Names}" SelectedIndex="{Binding NameIndex}"/&gt;
  </code></pre>
  
  <p>Although I specified that the second row should be only 14.3% high, both rows have the equal 50% height. Maybe I am missing some concept here?</p>
  
  <p>FULL CODE:</p>
  
  <pre><code>     &lt;ListViewItem&gt;
                                  &lt;Grid&gt;
  
                                      &lt;Grid.RowDefinitions&gt;
                                          &lt;RowDefinition Height="0.857*" /&gt;
                                          &lt;RowDefinition Height="0.143*" /&gt;
                                      &lt;/Grid.RowDefinitions&gt;
  
                                      &lt;Image Name="thumbImage" Grid.Row="0" Grid.RowSpan="2" Stretch="UniformToFill" Source="{Binding MainThumbImagePath}"/&gt;
  
                                      &lt;Image Name="contTitleImage" Grid.Row="0" Grid.RowSpan="2" Stretch="UniformToFill" Source="{Binding SlideTitleImagePath}"&gt;&lt;/Image&gt;
  
  
                                      &lt;ComboBox  Name="Names" Grid.Row="1" Grid.RowSpan="1" SelectedIndex="{Binding NameIndex}"/&gt;
  
  
                                  &lt;/Grid&gt;
  &lt;/ListViewItem&gt;
  </code></pre>