title: wanted to add two floating number which gets concatenated as string
body: <p>i want to add two float number with fixed two decimal but its converted to string and get concatenated.I know its simple question but actually i'm in hurry</p>
  
  <pre><code>var a=parseFloat("15.24869").toFixed(2)
     var b=parseFloat("15.24869").toFixed(2)
  </code></pre>
  
  <p>Update when i enter input as </p>
  
  <pre><code>var a=parseFloat("7,191");
  var b=parseFloat("359.55");
  c=(a+b).toFixed(2)
  O/P:NAN
  </code></pre>
  
  <p>why so?</p>