We have:
Net Income = 2,400
Beginning total assets = 30,500
Ending total assets = 20,000
Return on asset is net income divided by average total assets.
Average total assets = ( beginning total assets + ending total assets)/2
= (30500 +20000)/2
= 25,250
Return on asset = net income/ average total assets
= 2400 /25250
=9.50%
Therefore, Return on asset would be 9.50%.