One of my friends is a notorious cheapskate who wouldn’t spend an extra penny even if his dog’s life depended on it! When we were planning our trip to Alicante, Spain, he waited until the last minute so that we could get plane tickets at a 20% discount. We booked 5 tickets and paid a total of $1,200. If we booked earlier we wouldn’t have gotten the discount, so I guess I should thank him. Exactly how much money do we need if we did not get the discount?

What fraction of the original cost is the discount we got?