-30.58% is the change from 834 to 579
Calculation steps:
[( 579 - 834 ) ÷ 834] x 100 = -30.58%
Formula
Percentage change = [(579 - 834) / 834] x 100
Subtract the new number by the original number
579 - 834 = -255
-255 ÷ 834 = -0.3057553956834532
-0.3057553956834532 x 100 = -30.58%