Business I / Demand and Elasticity
Practice question · Estimate

If εp=0.5\varepsilon_p = -0.5 and price rises 20%, quantity falls by:

Estimate on a scale from 0% (0) to 30% (30).

Hints
  1. Multiply the elasticity by the percentage price change.
  2. A magnitude below one means the response is proportionally smaller.
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Why

%ΔQ=ε×%ΔP=0.5×20%=10%\%\Delta Q = \varepsilon \times \%\Delta P = -0.5 \times 20\% = -10\%. Inelastic demand: quantity falls by only half the percentage price increase.

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