Hello, can you explain it to me? I think this would be more math knowledge that I don't have. Why in the first it multiplies and in the second it divides? And why 0.10 if in the question is 10%.

Planes:

ROI = Controllable margin Average operating assets

15% = Controllable margin $25,000,000

Controllable margin = $25,000,000 15% = $3,750,000 (g)

Taxis:

ROI = Controllable margin Average operating assets

10% = $95,000 Average operating assets

Average operating assets = $95,000 0.10 = $950,000 (h)