• Westlake average return on investment for 2023 was 7.87, a 57.32% decline from 2022.
• Westlake average return on investment for 2022 was 18.44, a 70.11% decline from 2021.
• Westlake average return on investment for 2021 was 10.84, a 192.97% increase from 2020.

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.