title: Dividing one count() by another
body: <p>Trying to obtain a percentage value from an SQL query by dividing the number of rows where IsComplete = 1 with the total number of rows. How can I achieve this?</p>
  
  <p>Database table:</p>
  
  <p><img src="https://i.stack.imgur.com/6olEM.png" alt="table"></p>