TeX source:
\mathrm{ROE}=\frac{\text { Net profit }}{\text { Equity }}=\frac{\text { Net profit }}{\text { Pretax profit }} \times \frac{\text { Pretax profit }}{\text { EBIT }} \times \frac{\text { EBIT }}{\text { Sales }} \times \frac{\text { Sales }}{\text { Assets }} \times \frac{\text { Assets }}{\text { Equity }}