51.79% is the change from 168 to 255
Calculation steps:
[( 255 - 168 ) ÷ 168] x 100 = 51.79%
Formula
Percentage change = [(255 - 168) / 168] x 100
Subtract the new number by the original number
255 - 168 = 87
87 ÷ 168 = 0.5178571428571429
0.5178571428571429 x 100 = 51.79%