-30.79% is the change from 958 to 663
Calculation steps:
[( 663 - 958 ) ÷ 958] x 100 = -30.79%
Formula
Percentage change = [(663 - 958) / 958] x 100
Subtract the new number by the original number
663 - 958 = -295
-295 ÷ 958 = -0.3079331941544885
-0.3079331941544885 x 100 = -30.79%