Answer:
Around -4 percentage points
Step-by-step explanation:
The price elasticity is the measurement of change in quantity supplied or demanded with respect to the change in price.
The formula we can think for this problem would be:
Price Elasticity = Percentage Change in Quantity Demanded / Percentage Change in price
We let the initial price be 100 and initial quantity demanded of sales be 100
Given,
Percentage Change in Quantity is 20% increase
also
Percentage Change in Price is 5% decrease
We can say:
Price Elasticity = 20% / -5% = -4