Given the figures below :
Price of commodity A in January = N5.00
Price of commodity A in February = N7.00
Quantity of A bought in January = 20 kg
Quantity of A bought in February = 16 kg (a) Calculate:
(i) Percentage change in quantity bought (% )
(ii) Percentage change in price of A (% )
(iii) Coefficient of price elasticity of demand (e)

(b) From your answer:
(i) is the demand elastic or inelastic?
(ii) How do you know this?