From the information given, the price elasticity of demand is -5% and it can be sent that it's elastic.
The percentage change in the quantity demanded will be:
= (20 - 16) / 16 × 100
= 25%
The percentage change in price will be:
= (19 - 20) / 20 × 100
= -5%
Price elasticity of demand = 25/-5 = -5
Sincere it's greater than 1, it's elastic.
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