Answer:
percentage change in quantity demanded/percentage change in price.
Explanation:
As we know that
The formula to determine the price elasticity of demand is
= Percentage vary or change in quantity demanded ÷ percentage vary or change in price
It helps to identify the elasticity that means it is pefectly elastic, perfectly inelastic, unitary elastic, inelastic and elastic
hence, the last option is correct
And, the rest of the options would be wrong
