-89.7% is the change from 806 to 83
Calculation steps:
[( 83 - 806 ) ÷ 806] x 100 = -89.7%
Formula
Percentage change = [(83 - 806) / 806] x 100
Subtract the new number by the original number
83 - 806 = -723
-723 ÷ 806 = -0.8970223325062034
-0.8970223325062034 x 100 = -89.7%