EM or Percentages for Responsive Website?

Issue

Currently I have a completed website which currently isn't responsive most of the values for things are using pixels with a one or two using percentages and em.

Should I convert the pixel values to percentages or em values? Does one or the other actually make a difference. This is my first time making a website responsive so still sort of confused on the subject but am following this tutorial:

http://www.techrepublic.com/blog/web-designer/how-to-get-started-with-responsive-web-design/

Solution

Try to use % as much you can for width for use main container or div also use min-width and max-width, keep font sizes on px or em don't change that values to %.

Answered By - Vicky