A mathematical technique assists in calculating the percentage change between two values. Instead of using the initial value as the base for the percentage change, this approach employs the average of the initial and final values. For instance, if a product’s price increases from $10 to $12, the standard percentage change calculation would be (12-10)/10 = 20%. Using the alternative technique, the percentage change is (12-10)/((10+12)/2) = (2/11) or approximately 18.18%. A specialized online resource offers streamlined computation of these percentage variations. This tool simplifies the process and reduces the chance of error in manual calculations.
The application of the described calculation is particularly valuable in economics when analyzing elasticity, especially price elasticity of demand and supply. The primary advantage of using the averaging technique is that it provides a consistent percentage change regardless of whether the value increases or decreases. This eliminates the discrepancy that arises from using only the initial value as the base. This consistency ensures a more accurate representation of the proportional change between two points and avoids the arbitrary nature of the starting point influencing the result. This approach became relevant as the need for consistent measures of change in economic variables increased.