-33.16% is the change from 965 to 645
Calculation steps:
[( 645 - 965 ) ÷ 965] x 100 = -33.16%
Formula
Percentage change = [(645 - 965) / 965] x 100
Subtract the new number by the original number
645 - 965 = -320
-320 ÷ 965 = -0.3316062176165803
-0.3316062176165803 x 100 = -33.16%