WAEC Economics 1997 Question 6

The formula for calculating price elasticity of demand coefficient is

1. A.(percentage change in price)/(percentage change in quantity demanded)
2. B.(absolute decline in price)/(absolute increase in quantity demanded)
3. C.(percentage change in quantity demanded)/(percentage change in price)
4. D.(absolute decline in quantity demanded)/(absolute increase in price)
5. E.(change in quantity demanded)/(decrease in price)