# Define Price Elasticity of Demand. - Economics

Definition

Define price elasticity of demand.

#### Solution

It is the measure of the degree of responsiveness of the demand for a good to the changes in its price. It is defined as the percentage change in the demand for a good divided by the percentage change in its price.

"ed" = "Percentage change in demand for good"/"Percentage change in price of that good"

"ed" = (Δ"Q")/(Δ"P") xx "P"/"Q"

Where ΔQ = Q2 − Q1, change in demand
ΔP = P2 − P1, change in price
P1 = Initial price
Q1 = Initial quantity

Concept: Elasticity of Demand
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