-70.98% is the change from 255 to 74
Calculation steps:
[( 74 - 255 ) ÷ 255] x 100 = -70.98%
Formula
Percentage change = [(74 - 255) / 255] x 100
Subtract the new number by the original number
74 - 255 = -181
-181 ÷ 255 = -0.7098039215686275
-0.7098039215686275 x 100 = -70.98%