Answer:
15.79%
Step-by-step explanation:
Current Average operating asset = $500,000
Decrease in asset base will make average operating asset $380,000 [500000 - 120000]
ROI = Operating Income / New operating asset base
=$60,000 / $380,000
= 15.78947...% = 15.79%
Hence, the correct answer is 15.79%