To calculate the elasticity of demand which of the following formula is used
A. $$\frac{{{\text{Percentage change in demand}}}}{{{\text{Original demand}}}}$$
B. $$\frac{{{\text{Proportionate change in demand}}}}{{{\text{Proportionate change in price}}}}$$
C. $$\frac{{{\text{Change in demand}}}}{{{\text{Change in price}}}}{{ \div }}\frac{{{\text{Original demand}}}}{{{\text{Original price}}}}$$
D. $$\frac{{{\text{Change in demand}}}}{{{\text{Change in price}}}}$$
Answer: Option B

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