the price elasticity of a commodity y is half the p elasticity of commodity x 16% rise in the price of x results in an 40% . if the price of y falls by 8% . calculate the percentage fall . 

Dear student, 

According to the given information price elasticity of commodity x can be calculated as follows:

Price elasticity of X = %fall in quantity%rise in price= 4016= 2.5So, price elasticity of commodity y = 2.52=1.25Now, as per the information given for commodity Y, 1.25 = % fall in quantity8So, % fall in quantity =10

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