-40.52% is the change from 839 to 499
Calculation steps:
[( 499 - 839 ) ÷ 839] x 100 = -40.52%
Formula
Percentage change = [(499 - 839) / 839] x 100
Subtract the new number by the original number
499 - 839 = -340
-340 ÷ 839 = -0.4052443384982122
-0.4052443384982122 x 100 = -40.52%