-93.65% is the change from 850 to 54
Calculation steps:
[( 54 - 850 ) ÷ 850] x 100 = -93.65%
Formula
Percentage change = [(54 - 850) / 850] x 100
Subtract the new number by the original number
54 - 850 = -796
-796 ÷ 850 = -0.9364705882352942
-0.9364705882352942 x 100 = -93.65%