Hi there!
First we need to realise that the 18% discount equals John's savings. Therefore 18% of the original price is $13.23.
When we know 18% of the price, we can also find 1% of the total price.
18% = $13.23
Divide both sides by 18.
1% = $0.735
To find the total price, which equals 100%, we know only need to multiply both sides by 100.
100% = $73.50.
Therefore, the original price for the coat is $73.50.
~ Hope this helps you!