-86.64% is the change from 958 to 128
Calculation steps:
[( 128 - 958 ) ÷ 958] x 100 = -86.64%
Formula
Percentage change = [(128 - 958) / 958] x 100
Subtract the new number by the original number
128 - 958 = -830
-830 ÷ 958 = -0.8663883089770354
-0.8663883089770354 x 100 = -86.64%