Price elasticity of demand (E) is expressed as (? means change):

A. E = Price (P) ÷ Quantity demanded (Q).
B. E = Quantity demanded (Q) ÷ Price (P).
C. E = Quantity demanded (Q) × Price (P).
D. E = Percentage change in quantity demanded (%? in Q) ÷ Percentage change in price (%? in P).
E. E = Percentage change in price (%? in P) ÷ Percentage change in quantity demanded (%? in Q).


Answer: D

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