-30.63% is the change from 839 to 582
Calculation steps:
[( 582 - 839 ) ÷ 839] x 100 = -30.63%
Formula
Percentage change = [(582 - 839) / 839] x 100
Subtract the new number by the original number
582 - 839 = -257
-257 ÷ 839 = -0.3063170441001192
-0.3063170441001192 x 100 = -30.63%