Answer:
The percentage difference between two countries is 12.5%
Step by Step Explanation:
Given:
Average consumption of electricity in Blacksburg city=900

Average consumption of electricity in Springfield=1020

To find:
Percentage difference between the average consumption in two towns
Solution:
According to the formula, percentage difference is calculated as

Value of larger town=Average consumption of electricity in Springfield
=1020
Value of smaller town= Average consumption of electricity in Blacksburg
=900
Sum value of two towns=1020+900=1920
Substitute these values in the above equation we get
Result:
Thus the percentage difference between the average consumption of electricity between two towns =12.5%