title: Determine percentage of a number for dynamic min/max values
body: <p>I am trying to populate a range input in my application with dynamic min and max values.  I am returned a default number from the server and need to determine the min (1/5 of default) and max (5x's default) values to set on the range input.  The default value, what the range is currently set to, must be in the middle of the slider. </p>
  
  <p>For example:</p>
  
  <p>min (1/5 of 700) |______________| default (ex. 700) |_______________| max (5x's700)</p>