-33.26% is the change from 965 to 644
Calculation steps:
[( 644 - 965 ) ÷ 965] x 100 = -33.26%
Formula
Percentage change = [(644 - 965) / 965] x 100
Subtract the new number by the original number
644 - 965 = -321
-321 ÷ 965 = -0.33264248704663213
-0.33264248704663213 x 100 = -33.26%