My work is in bold but i need help answering this question: Please explain to Ethel Hartz, largest shareholder, what the return-on-investment means. What does that amount represent? How can she compare the two returns from problem 1?

Hartz Industries has two divisions as follows: American 9,000,000 National 15,000,000 Net Income Invested Assets 36,000,000 40,000,000 Expected Rate of Return 12.00% 10.50% Return on Investment 25% 37.50% Expected Net Income 4,320,000 4,200,000 Residual Income 4,680,000 10,800,000