You can put this solution on YOUR website! 48/60=0.8=80%
So $48 is 80% of the original price of $60.
100%-discout=80%
so the discount is 20%
I hope this helps.
Adam
P.S. please visit my website, I only set it up last week and it may be of use to you. The address is http://geocities.com/quibowibbler