What we are looking for is the percent decrease of the store sold camera to the Ebay sold one. In order to get this, we first subtract 65 from 129 in order to get 64. 64 is the price decrease. Now in order to get the percentage decrease, all we have to do is divide 64 to 129. So 64/129 will yield us with 0.496124 (or simply 0.496) In order to turn that into a percentage, we just have to multiply this with 100 in order to get 49.6%. So the percentage decrease is 49.6%
