title: Excel number format to only show decimals when necessary
body: <p>How can I, without using formulas, show integers as integers, but decimals limited to a specific number of decimal places?</p>
  <p>E.g. show:<br />
  <code>1</code> as <code>1</code><br />
  <code>12</code> as <code>12</code><br />
  but <code>1.23456789</code> as <code>1.23</code></p>
  <p>The number format <code>0.##</code> is close but it shows <code>1</code> as <code>1.</code> etc.</p>