-65.88% is the change from 255 to 87
Calculation steps:
[( 87 - 255 ) ÷ 255] x 100 = -65.88%
Formula
Percentage change = [(87 - 255) / 255] x 100
Subtract the new number by the original number
87 - 255 = -168
-168 ÷ 255 = -0.6588235294117647
-0.6588235294117647 x 100 = -65.88%