Suppose an Increase in Price Decreases Quantity Demanded from 210

Multiple Choice

Suppose an increase in price decreases quantity demanded from 210 to 190.Using the mid-point formula,the percentage change in quantity demanded is:

A) 2 = 200 percent.
B) 0.2 = 20 percent.
C) 0.2 = 20 percent
D) 0.1 = 10 percent