-88.1% is the change from 857 to 102
Calculation steps:
[( 102 - 857 ) ÷ 857] x 100 = -88.1%
Formula
Percentage change = [(102 - 857) / 857] x 100
Subtract the new number by the original number
102 - 857 = -755
-755 ÷ 857 = -0.8809801633605601
-0.8809801633605601 x 100 = -88.1%