Function decreaseByPercentage

decreaseByPercentage(value, percentage, decimals): bigint
Decrease a number by given percentage
Parameters
- value: string | number | bigint
  The number to decrease
- percentage: string | number
  The percentage to decrease by
- decimals: number
  The decimals of the value.
Returns bigint
The decreased number (e.g. 100 - 30% of 100 = 70)
Example
```
decreaseByPercentage('100', 10, 2) // 90
decreaseByPercentage('100', 25, 2) // 75
decreaseByPercentage(-100, 50, 9) // -150
```