-91.54% is the change from 958 to 81
Calculation steps:
[( 81 - 958 ) ÷ 958] x 100 = -91.54%
Formula
Percentage change = [(81 - 958) / 958] x 100
Subtract the new number by the original number
81 - 958 = -877
-877 ÷ 958 = -0.9154488517745303
-0.9154488517745303 x 100 = -91.54%