-93.3% is the change from 851 to 57
Calculation steps:
[( 57 - 851 ) ÷ 851] x 100 = -93.3%
Formula
Percentage change = [(57 - 851) / 851] x 100
Subtract the new number by the original number
57 - 851 = -794
-794 ÷ 851 = -0.9330199764982373
-0.9330199764982373 x 100 = -93.3%