Apainting is 3,000 it is sold for 325 increase price

If the owner sold the painting for a 10% increase in price, its retail price would be (1 + 0.1)*($3000) = 1.1*($3000) = $3300. By the same logic, a 325% increase in price would be (1 + 3.25)*($3000) = 4.25*($3000) = $12,750 retail price.