The map below shows some farms. The county charges a tax based on the size of each farm, not on the quality of the land, so all land is taxed at the same rate. The Joneses pay $5,250 per year in taxes. After the map was drawn, the Bakers purchased some property from the Petits and increased the size of their property to 125% of its size on the map. By approximately what percent will the Petits' tax bill decrease and how much will they have to pay?