-39.44% is the change from 857 to 519
Calculation steps:
[( 519 - 857 ) ÷ 857] x 100 = -39.44%
Formula
Percentage change = [(519 - 857) / 857] x 100
Subtract the new number by the original number
519 - 857 = -338
-338 ÷ 857 = -0.3943990665110852
-0.3943990665110852 x 100 = -39.44%