Neco 2024 Data Processing Question 28

A small business records its monthly sales (in thousand Naira) for the current year as follows: Jan 120, Feb 150, Mar 130, Apr 160, May 170, Jun 155, Jul 180, Aug 190, Sep 175, Oct 200, Nov 210, Dec 195. They compute a 3-month moving average for each month from March to December. Identify the months whose moving average exceeds \(165\), sum the original sales for those months, and compare this sum with the sum of sales for the same months in the previous year, which were: Jan 110, Feb 140, Mar 120, Apr 150, May 160, Jun 145, Jul 170, Aug 180, Sep 165, Oct 190, Nov 200, Dec 185. What is the percentage increase (to two decimal places) of the current-year sum over the previous-year sum for the identified months?