157.58% is the change from 99 to 255
Calculation steps:
[( 255 - 99 ) ÷ 99] x 100 = 157.58%
Formula
Percentage change = [(255 - 99) / 99] x 100
Subtract the new number by the original number
255 - 99 = 156
156 ÷ 99 = 1.5757575757575757
1.5757575757575757 x 100 = 157.58%