-97.64% is the change from 806 to 19
Calculation steps:
[( 19 - 806 ) ÷ 806] x 100 = -97.64%
Formula
Percentage change = [(19 - 806) / 806] x 100
Subtract the new number by the original number
19 - 806 = -787
-787 ÷ 806 = -0.9764267990074442
-0.9764267990074442 x 100 = -97.64%