-33.16% is the change from 968 to 647
Calculation steps:
[( 647 - 968 ) ÷ 968] x 100 = -33.16%
Formula
Percentage change = [(647 - 968) / 968] x 100
Subtract the new number by the original number
647 - 968 = -321
-321 ÷ 968 = -0.33161157024793386
-0.33161157024793386 x 100 = -33.16%