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

```ts
const Ratio: brand(
  "Ratio",
  lessThanOrEqualTo(1)(NonNegativeFiniteNumber),
);
```

Defined in: [packages/common/src/Type.ts:6905](https://github.com/evoluhq/evolu/blob/f0109fb501a593010e858e39248dde1200eeb2d7/packages/common/src/Type.ts#L6905)

Finite [Number](https://evolu.dev/docs/api-reference/common/Type/variables/Number) from zero to one, inclusive.

Ratios are the numeric representation of percentages: `0.25` represents 25%.