-49.02% is the change from 255 to 130
Calculation steps:
[( 130 - 255 ) ÷ 255] x 100 = -49.02%
Formula
Percentage change = [(130 - 255) / 255] x 100
Subtract the new number by the original number
130 - 255 = -125
-125 ÷ 255 = -0.49019607843137253
-0.49019607843137253 x 100 = -49.02%