Answer:
Price elasticity of demand is an economic measure of the change in the quantity demanded or purchased of a product in relation to its price change. Expressed mathematically, it is:
Price Elasticity of Demand = % Change in Quantity Demanded / % Change in Price
Price elasticity is used by economists to understand how supply or demand changes given changes in price to understand the workings of the real economy. For instance, some goods are very inelastic, that is, their prices do not change very much given changes in supply or demand, for example people need to buy gasoline to get to work or travel around the world, and so if oil prices rise, people will likely still buy just the same amount of gas. On the other hand, certain goods are very elastic, their price moves cause substantial changes in its demand or its supply
