title: Add percentage discount for individual product in magento
body: <p>I need to give percentage discount for my simple products in magento and I need to show the discount amount in the front end also.</p>
  
  <p>I had googled to find a solution but I could not find any. I tried to use shipping cart rules, but I need to give discount for some product only, not the whole cart amount. </p>
  
  <p>I know I can assign it in special price, but there percentage value is not accepting.</p>
  
  <p>Any one know how to do it?</p>