-63.39% is the change from 866 to 317
Calculation steps:
[( 317 - 866 ) ÷ 866] x 100 = -63.39%
Formula
Percentage change = [(317 - 866) / 866] x 100
Subtract the new number by the original number
317 - 866 = -549
-549 ÷ 866 = -0.6339491916859122
-0.6339491916859122 x 100 = -63.39%