-39.86% is the change from 971 to 584
Calculation steps:
[( 584 - 971 ) ÷ 971] x 100 = -39.86%
Formula
Percentage change = [(584 - 971) / 971] x 100
Subtract the new number by the original number
584 - 971 = -387
-387 ÷ 971 = -0.39855818743563337
-0.39855818743563337 x 100 = -39.86%