-72.11% is the change from 857 to 239
Calculation steps:
[( 239 - 857 ) ÷ 857] x 100 = -72.11%
Formula
Percentage change = [(239 - 857) / 857] x 100
Subtract the new number by the original number
239 - 857 = -618
-618 ÷ 857 = -0.721120186697783
-0.721120186697783 x 100 = -72.11%