[API reference](https://evolu.dev/docs/api-reference) › [@evolu/common](https://evolu.dev/docs/api-reference/common) › [Number](https://evolu.dev/docs/api-reference/common/Number) › percentageToRatio

```ts
function percentageToRatio(
  percentage: Percentage,
): number &
  Brand<"NonNaN"> &
  Brand<"Finite"> &
  Brand<"NonNegative"> &
  Brand<"LessThanOrEqualTo1"> &
  Brand<"Ratio">;
```

Defined in: [packages/common/src/Number.ts:189](https://github.com/evoluhq/evolu/blob/dd96d79f1dbe9a49fa12ce8e0aa7d3d0177795ca/packages/common/src/Number.ts#L189)

Converts a [Percentage](https://evolu.dev/docs/api-reference/common/Number/type-aliases/Percentage) to its numeric [Ratio](https://evolu.dev/docs/api-reference/common/Type/variables/Ratio).