title: How to calculate percentage change using factorial analysis?
body: <p>To assess the contribution of various input factors (x, y, z) and their interactions to the response variable (A), I calculated the percentage of variance using factorial analysis in Minitab. Now I want to calculate the percentage change in A.</p>
  
  <p>Say for example A is increasing when x and y are increasing and A is decreasing when z is decreasing. So how much percentage is changing in A?
  Is there any other software by which I can do this analysis?</p>
  
  <p>Please help me in this regards.</p>
  
  <p>Thanks.</p>