-40.63% is the change from 128 to 76
Calculation steps:
[( 76 - 128 ) ÷ 128] x 100 = -40.63%
Formula
Percentage change = [(76 - 128) / 128] x 100
Subtract the new number by the original number
76 - 128 = -52
-52 ÷ 128 = -0.40625
-0.40625 x 100 = -40.63%