14 at 15% discount its 14 dollars and a 15% discount

You do 14 times 15=70. Then move decimal 2 places to the left= 0.70

To figure this out, we must figure how much of the total we have to pay. Thus to find the complement (net price/actual price), we must subtract the discount percentage by 100%
So your discount, will look like this, 100%-15%=85%

Then multiply to find the actual discount taken off,

=0.85(14)
=$11.90