-33.2% is the change from 967 to 646
Calculation steps:
[( 646 - 967 ) ÷ 967] x 100 = -33.2%
Formula
Percentage change = [(646 - 967) / 967] x 100
Subtract the new number by the original number
646 - 967 = -321
-321 ÷ 967 = -0.33195449844881075
-0.33195449844881075 x 100 = -33.2%