-87.06% is the change from 255 to 33
Calculation steps:
[( 33 - 255 ) ÷ 255] x 100 = -87.06%
Formula
Percentage change = [(33 - 255) / 255] x 100
Subtract the new number by the original number
33 - 255 = -222
-222 ÷ 255 = -0.8705882352941177
-0.8705882352941177 x 100 = -87.06%