Function formatPercentage

formatPercentage(value: number, decimalPlaces?: number): string
Formats a decimal as a percentage

Converts decimal values (0-1 range) to percentage strings with configurable decimal places. Useful for displaying metrics like uptime, completion rates, or risk reduction percentages.
Parameters
- value: number
  Decimal value where 1.0 = 100% (e.g., 0.75 = 75%)
- decimalPlaces: number = 0
  Number of decimal places to display
Returns string
Formatted percentage string with % symbol
Example
```
formatPercentage(0.754, 1)    // "75.4%"
formatPercentage(0.99, 0)     // "99%"
formatPercentage(0.9999, 2)   // "99.99%"
formatPercentage(1, 0)        // "100%"
```
- Defined in utils/formatUtils.ts:48