If price changed from P1 to P2, causing quantity demanded to change from Q1 to Q2: using the midpoint method; what is the percentage change in quantity?

Select one:

a.

-66.67%

b.

0.6667

c.

-0.6667

d.

66.67%

Price Quantity Price Quantity Income Quantity

P₁ 9.00 Q₁ 1.000 P_y1 8.00 Q_x1 2.000 Income₁ $28,000.00 Q₁ 50.00

P₂ 8.00 Q₂ 2.000 P_y2 7.00 Q_x2 3.000 Income₂ $30,000.00 Q₂ 52.00