my income on food , when the income doubled I spent only 20 % of my income on food . Calculate my income elasticity of demand for food ?Please Answer this question.
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Y= 10000
Q= 4000
Y2=20000
Q2= 4000
ΔY= 10000
ΔQ=0
ey= 0/10000 * 10000/4000
=0
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