-39.75% is the change from 971 to 585
Calculation steps:
[( 585 - 971 ) ÷ 971] x 100 = -39.75%
Formula
Percentage change = [(585 - 971) / 971] x 100
Subtract the new number by the original number
585 - 971 = -386
-386 ÷ 971 = -0.39752832131822863
-0.39752832131822863 x 100 = -39.75%