-30.51% is the change from 839 to 583
Calculation steps:
[( 583 - 839 ) ÷ 839] x 100 = -30.51%
Formula
Percentage change = [(583 - 839) / 839] x 100
Subtract the new number by the original number
583 - 839 = -256
-256 ÷ 839 = -0.30512514898688914
-0.30512514898688914 x 100 = -30.51%