-30.93% is the change from 957 to 661
Calculation steps:
[( 661 - 957 ) ÷ 957] x 100 = -30.93%
Formula
Percentage change = [(661 - 957) / 957] x 100
Subtract the new number by the original number
661 - 957 = -296
-296 ÷ 957 = -0.30929989550679204
-0.30929989550679204 x 100 = -30.93%