Defects per million opportunities $(dpmo)=$

$($Number of defects discovered $/$ Opportunities for error$)x100,000$

$($Number of defects discovered $/$ Opportunities for error$)1,000,000$

Opportunities for error x Number of defects discovered $\frac{?}{1},000,000$

Opportunities for error $/($Number of defects discovered x $10,000,000)$