-30.72% is the change from 957 to 663
Calculation steps:
[( 663 - 957 ) ÷ 957] x 100 = -30.72%
Formula
Percentage change = [(663 - 957) / 957] x 100
Subtract the new number by the original number
663 - 957 = -294
-294 ÷ 957 = -0.3072100313479624
-0.3072100313479624 x 100 = -30.72%