[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) › negativeDecimalString

```ts
const negativeDecimalString: BrandFactory<
  "NegativeDecimalString",
  DecimalString,
  NegativeDecimalStringError
>;
```

Defined in: [packages/common/src/Type.ts:7180](https://github.com/evoluhq/evolu/blob/037c390af081e9944d616ff298a729515c5c5ab7/packages/common/src/Type.ts#L7180)

[DecimalString](https://evolu.dev/docs/api-reference/common/Type/variables/DecimalString) Brand requiring a value less than zero.

### Example

```ts

const Negative = negativeDecimalString(DecimalString);

assertOk(Negative.fromUnknown("-0.5"), "-0.5");
```