-36.71% is the change from 839 to 531
Calculation steps:
[( 531 - 839 ) ÷ 839] x 100 = -36.71%
Formula
Percentage change = [(531 - 839) / 839] x 100
Subtract the new number by the original number
531 - 839 = -308
-308 ÷ 839 = -0.367103694874851
-0.367103694874851 x 100 = -36.71%