-93.73% is the change from 255 to 16
Calculation steps:
[( 16 - 255 ) ÷ 255] x 100 = -93.73%
Formula
Percentage change = [(16 - 255) / 255] x 100
Subtract the new number by the original number
16 - 255 = -239
-239 ÷ 255 = -0.9372549019607843
-0.9372549019607843 x 100 = -93.73%