-94.28% is the change from 857 to 49
Calculation steps:
[( 49 - 857 ) ÷ 857] x 100 = -94.28%
Formula
Percentage change = [(49 - 857) / 857] x 100
Subtract the new number by the original number
49 - 857 = -808
-808 ÷ 857 = -0.9428238039673279
-0.9428238039673279 x 100 = -94.28%