The number to increasea
The percentage to increase by
The decimals of the value.
The increased number (e.g. 100 + 10% of 100 = 110)
increaseByPercentage('100', 10, 2) // 110
increaseByPercentage('100', 25, 2) // 125
increaseByPercentage(-100, 50, 9) // -50
Increase a number by given percentage