-99.9% is the change from 958 to 1
Calculation steps:
[( 1 - 958 ) ÷ 958] x 100 = -99.9%
Formula
Percentage change = [(1 - 958) / 958] x 100
Subtract the new number by the original number
1 - 958 = -957
-957 ÷ 958 = -0.9989561586638831
-0.9989561586638831 x 100 = -99.9%