-93.75% is the change from 128 to 8
Calculation steps:
[( 8 - 128 ) ÷ 128] x 100 = -93.75%
Formula
Percentage change = [(8 - 128) / 128] x 100
Subtract the new number by the original number
8 - 128 = -120
-120 ÷ 128 = -0.9375
-0.9375 x 100 = -93.75%
Example