-36.08% is the change from 255 to 163
Calculation steps:
[( 163 - 255 ) ÷ 255] x 100 = -36.08%
Formula
Percentage change = [(163 - 255) / 255] x 100
Subtract the new number by the original number
163 - 255 = -92
-92 ÷ 255 = -0.3607843137254902
-0.3607843137254902 x 100 = -36.08%