Question

The price of a good rises from 15 to 10, and the quantity demanded changed from 750 units to 1000 units. Calculate the price elasticity of demand.​

Answer 1

We are given,

Percentage fall in demand =20

Initial Price =10

New Price =12

% Increase in Price =

10

2

×100=20%

We know,

e

d

=−

%change in price

%change in Demand

=−

20

20

=−1

Now, if price rises from 10 to 13

% Change in price −

10

3

×100=30%

So,

% Change in Demand =% change in Price ×e

d

=30×−1=−30

So, we can say that if the price rises from Rs. 10 to Rs. 13, i.e by 30%, then the demand will fall by 30%. This is because the good follows unitary elasticity.