-83.4% is the change from 958 to 159
Calculation steps:
[( 159 - 958 ) ÷ 958] x 100 = -83.4%
Formula
Percentage change = [(159 - 958) / 958] x 100
Subtract the new number by the original number
159 - 958 = -799
-799 ÷ 958 = -0.8340292275574113
-0.8340292275574113 x 100 = -83.4%