-40.37% is the change from 971 to 579
Calculation steps:
[( 579 - 971 ) ÷ 971] x 100 = -40.37%
Formula
Percentage change = [(579 - 971) / 971] x 100
Subtract the new number by the original number
579 - 971 = -392
-392 ÷ 971 = -0.40370751802265703
-0.40370751802265703 x 100 = -40.37%