-33.54% is the change from 957 to 636
Calculation steps:
[( 636 - 957 ) ÷ 957] x 100 = -33.54%
Formula
Percentage change = [(636 - 957) / 957] x 100
Subtract the new number by the original number
636 - 957 = -321
-321 ÷ 957 = -0.335423197492163
-0.335423197492163 x 100 = -33.54%