> For the complete documentation index, see [llms.txt](https://ifichi.gitbook.io/ifichi/llms.txt). Markdown versions of documentation pages are available by appending `.md` to page URLs; this page is available as [Markdown](https://ifichi.gitbook.io/ifichi/what-is-ifichi/lending-system/protocol-mathematics.md).

# Protocol Mathematics

#### **PRBMath Library**

IFICHI uses the PRBMath fixed-point math library for precise fractional calculations.

#### **Precision Standards**

Numbers within IFICHI are represented as "UD60x18" for high-level precision, aligning with ETH's standard of 18 decimal places.