title: What's the math formula converting a smaller number to larger decimal and vice-versa?
body: <p>Here's an image that describes exactly what I'm looking for, the numbers are irrelevant just for example: <a href="https://dl.dropboxusercontent.com/u/414973/num_conversion.jpg" rel="nofollow">https://dl.dropboxusercontent.com/u/414973/num_conversion.jpg</a></p>
  
  <p>Say I have a decimal range from 1.2 to 5.4 and a range of numbers from 200 to 212 and I want 212 to represent 1.2 and 200 to represent 5.4 and then breaking down the numbers in that range via a formula.</p>
  
  <p>Hope this makes sense.</p>
  
  <p>Thanks!</p>