@setlocal
@set /a received=(%1-%2)*100/%1

@echo ^<AssessmentResult^>
@echo   ^<Iterations^>
@echo     ^<Iteration^>
@echo       ^<MetricValues^>

@echo         ^<MetricValue^>
@echo           ^<ProgrammaticName^>Sent^</ProgrammaticName^> 
@echo           ^<Value^>%1^</Value^> 
@echo         ^</MetricValue^>

@echo         ^<MetricValue^>
@echo           ^<ProgrammaticName^>Lost^</ProgrammaticName^> 
@echo           ^<Value^>%2^</Value^>
@echo         ^</MetricValue^>

@echo         ^<MetricValue^>
@echo           ^<ProgrammaticName^>Received^</ProgrammaticName^> 
@echo           ^<Value^>%received%^</Value^>
@echo         ^</MetricValue^>

@echo       ^</MetricValues^>
@echo     ^</Iteration^>
@echo   ^</Iterations^>
@echo ^</AssessmentResult^>