-69.53% is the change from 128 to 39
Calculation steps:
[( 39 - 128 ) ÷ 128] x 100 = -69.53%
Formula
Percentage change = [(39 - 128) / 128] x 100
Subtract the new number by the original number
39 - 128 = -89
-89 ÷ 128 = -0.6953125
-0.6953125 x 100 = -69.53%