Complex sentence: "Return On Net Assets" (RONA) is a measure of financial performance of a company and calculated as net income divided by fixed assets plus working capital, i.e. net income/(fixed assets + working capital).
Split into simpler sentences: Return On Net Assets (RONA) is a measure of financial performance of a company and calculated as net income divided by fixed assets plus working capital. By formula: net income/(fixed assets + working capital).