title: PHP Simple Math Calculation
body: <p>can help me to see this calculation? It suppose echo "equal"... but it give me "not equal"</p>
  
  <pre><code>&lt;?php
  $tl_pax = 1;
  $ct_pax = 2;
  $at_pax = 2;
  
  $a = 0.5;
  $b = 0.2;
  $c = 0.2;
  $d = 0.2;
  $e = 0.2;
  $f = 0.2;
  $g = 0.2;
  $h = 0.9;
  
  $sum = $a + $b + $c + $d + ($e * $tl_pax) + ($f * $ct_pax) + ($g * $at_pax) + $h;
  
  $total = 3;
  
  if($total == $sum){
      echo 'equal: ' . $sum . ' - ' . $total;
  }
  else{
      echo 'not equal: ' . $sum . ' - ' . $total;
  }
  ?&gt;
  </code></pre>