The numerical measure of elasticity is

• A \(\frac{\text{%change in Q}}{\text{%change in P}}\)
• B \(\frac{\text{change in Q}}{\text{change in P}}\)
• C \(\frac{\text{%change in P}}{\text{%change in Q}}\)
• D \(\frac{\text{change in P plus change in Q}}{\text{change in P}}\)