Suppose that during the past year, the price of a laptop computer fell from $2,950 to $2,450. During the same time period, consumer sales increased from 430,000 to 619,000 laptops.
Calculate the elasticity of demand between these two price-quantity combinations by using the following steps. After each step, complete the relevant part of the table with the appropriate answers. (Note: For decreases in price or quantity, enter values in the Change column with a minus sign.)

Original New Average Change Percentage Change
Quantity ? ? ? ? a. 36.03%,
b. 18.02%,
c. 277.51%

Price($) ? ? ? ? a. -18.52%,
b. -540%,
c. -9.26%

Step 1: Fill in the appropriate values for original quantity, new quantity, original price, and new price.
Step 2: Calculate the average quantity by adding the original quantity and the new quantity, and then dividing by two. Do the same for the average price.
Step 3: Calculate the change in quantity by subtracting the original quantity from the new quantity. Do the same for the change in price.
Step 4: Calculate the percentage change in quantity demanded by dividing the change in quantity by the average quantity. Do the same to calculate the percentage change in price.
Step 5: Calculate the price elasticity of demand by dividing the percentage change in quantity demanded by the percentage change in price, ignoring the negative sign.