-85.16% is the change from 128 to 19
Calculation steps:
[( 19 - 128 ) ÷ 128] x 100 = -85.16%
Formula
Percentage change = [(19 - 128) / 128] x 100
Subtract the new number by the original number
19 - 128 = -109
-109 ÷ 128 = -0.8515625
-0.8515625 x 100 = -85.16%