-94.05% is the change from 857 to 51
Calculation steps:
[( 51 - 857 ) ÷ 857] x 100 = -94.05%
Formula
Percentage change = [(51 - 857) / 857] x 100
Subtract the new number by the original number
51 - 857 = -806
-806 ÷ 857 = -0.94049008168028
-0.94049008168028 x 100 = -94.05%