Hi! How do I calculate the company's ROI for this year to compare its ROI to last year?

Westerville Company reported the following results from last year's operations: This year, the company has a $120,000 investment opportunity with the following cost and revenue characteristics: The company's minimum required rate of return is 15%. Required: If Westerville's Chief Executive Officer will earn a bonus only if her ROI from this year exceeds her ROI from last year, would she pursue the investment opportunity? Yes No Would the owners of the company want her to pursue the investment opportunity? Yes No