The original price of the shorts would have been $19.20. To find this answer you would have to multiply and add.
First thing I did was turn 20% into a decimal by moving the decimal to the left 2 times.(.20)
Second thing I did was multiply 16.00*.20. Which came up to be 3.20.
The third thing that you would have to do is add 3.20 to the price Faye paid for the shorts.
3.20+16.00
And the original price would have came up to $19.20
Hope this helps:)