-30.69% is the change from 958 to 664
Calculation steps:
[( 664 - 958 ) ÷ 958] x 100 = -30.69%
Formula
Percentage change = [(664 - 958) / 958] x 100
Subtract the new number by the original number
664 - 958 = -294
-294 ÷ 958 = -0.3068893528183716
-0.3068893528183716 x 100 = -30.69%