-33.09% is the change from 958 to 641
Calculation steps:
[( 641 - 958 ) ÷ 958] x 100 = -33.09%
Formula
Percentage change = [(641 - 958) / 958] x 100
Subtract the new number by the original number
641 - 958 = -317
-317 ÷ 958 = -0.33089770354906056
-0.33089770354906056 x 100 = -33.09%