-63.41% is the change from 861 to 315
Calculation steps:
[( 315 - 861 ) ÷ 861] x 100 = -63.41%
Formula
Percentage change = [(315 - 861) / 861] x 100
Subtract the new number by the original number
315 - 861 = -546
-546 ÷ 861 = -0.6341463414634146
-0.6341463414634146 x 100 = -63.41%