Calculate percentage on SSRS Expressions
<p>I have the following table on SQL:</p>

<pre><code>Category  |   Requests
Cat1      |   150
Cat2      |   200
Cat3      |   550
Cat4      |   100
Cat5      |   50
SUM       |   1050
</code></pre>

<p>How can  create an expression to calculate the percentage of Cat5 compared to the total? (4.7% in this case). </p>