• Arcadis average return on investment for 2012 was 9.96, a 55.54% increase from 2011.
• Arcadis average return on investment for 2011 was 22.4, a 7.95% decline from 2010.
• Arcadis average return on investment for 2010 was 20.75, a 62.75% increase from 2009.

Roi - return on investment can be defined as an indicator of how profitable a company is relative to its assets invested by shareholders and long-term bond holders. Calculated by dividing a company's operating earnings by its long-term debt and shareholders equity.