The price of a house is originally listed at $225,000. the owners are having a hard time selling it and decide to reduce the price to $191,250. what is the percentage decrease of the price of the house?

Percent decrease : (original number - new number) / original number..*100
                            = (225,000 - 191,250) / 225,000* 100
                            = 33,750 / 225,000* 100
                            = 0.15 * 100
                            = 15% decrease <==