-38.27% is the change from 857 to 529
Calculation steps:
[( 529 - 857 ) ÷ 857] x 100 = -38.27%
Formula
Percentage change = [(529 - 857) / 857] x 100
Subtract the new number by the original number
529 - 857 = -328
-328 ÷ 857 = -0.38273045507584597
-0.38273045507584597 x 100 = -38.27%