-32.88% is the change from 964 to 647
Calculation steps:
[( 647 - 964 ) ÷ 964] x 100 = -32.88%
Formula
Percentage change = [(647 - 964) / 964] x 100
Subtract the new number by the original number
647 - 964 = -317
-317 ÷ 964 = -0.3288381742738589
-0.3288381742738589 x 100 = -32.88%