Microsoft is changing yet again the way that it will report its financials. Instead of reporting the financial results of seven business units, Microsoft now will report results of five units. The company is folding its two worst-performing divisions – Microsoft Business Solutions (its business applications unit) and its Mobile and Embedded units – into the Microsoft Business Division and Microsoft Home and Entertainment units, respectively. Microsoft officials claim the new structure reflects the way the company is now organized into three overarching business units. We were never too good at the new math….