-99.77% is the change from 857 to 2
Calculation steps:
[( 2 - 857 ) ÷ 857] x 100 = -99.77%
Formula
Percentage change = [(2 - 857) / 857] x 100
Subtract the new number by the original number
2 - 857 = -855
-855 ÷ 857 = -0.9976662777129521
-0.9976662777129521 x 100 = -99.77%