If the price of a commodity be raised by 20% then by how much % a house holder reduce his consumption so that the expenditure does not change?
16.66%
18.66%
10.66%
1.66%
Expenditure = rate x consumption
Here the expenditure remains constant in both the cases
Initially 1x1=1
After change 1.2 x a=1
This means 1.2a = 1 and a = .833 and hence decrease will be 16.66%